Category Archives: Russia and also USSR

The Engineering History of the Not So Lowly AK-47 Rivet

I’ve been involved with AK rifle building since 2006 and there’s something we take for granted – how rivets are used to secure the forged trunnions, trigger guards and, when they exist, side mount scope rail to the sheet metal receiver and the trigger guard. The photo above are AK-Builder brand rivets for an Avtomat Kalashnikova Modernizirovanniy (AKM) rifle by the way. Let’s take a deeper, very focused look, at the engineering behind the use of the not so lowly rivet and the AKM rifle.

Section 1: Introduction to the AKM Stamped Receiver and Rivet-Based Assembly

The design of the 7.62mm AKM represents a pivotal moment in 20th-century small arms manufacturing. Its departure from the milled-receiver construction of its predecessor, the AK-47, in favor of a stamped-steel receiver assembly, necessitated a comprehensive and robust method for joining dissimilar components under significant operational stress. This report provides a detailed engineering analysis of the riveting system employed in the AKM, examining the materials, dimensions, geometry, and underlying mechanical principles that make it a successful and enduring design.

1.1 The Evolution from Milled to Stamped: Engineering and Production Imperatives

The original AK-47, while exceptionally reliable, was built upon a receiver machined from a solid forging of steel. This process was labor-intensive, time-consuming, and resulted in significant material waste. The primary engineering driver for the development of the AKM, introduced in 1959, was the optimization for mass production.1 Soviet engineers sought to reduce manufacturing complexity, cost, and the overall weight of the rifle without compromising the platform’s legendary reliability.2

The solution was a paradigm shift from a milled receiver to one formed from a single 1.0 mm thick sheet of steel.1 This change dramatically reduced machine time and cost, allowing for faster production rates to meet the vast needs of the Soviet military and its allies. However, this created a new engineering challenge: a thin, U-shaped stamped steel shell lacks the inherent strength and rigidity to contain the forces of a firing 7.62x39mm cartridge and guide the bolt carrier group with the necessary precision.4 The AKM’s riveting system is the critical design element that solves this problem.

1.2 The Functional Role of Trunnions and Rivets in the AKM Design

The AKM design cleverly separates the functions of pressure containment and component housing. The immense stress of firing is handled by two key high-strength components: the front and rear trunnions.6

  • The Front Trunnion: This is a precisely machined block of steel that serves as the heart of the rifle. It holds the barrel, provides the locking recesses for the bolt’s rotating lugs, and contains the peak chamber pressure upon firing. It absorbs the primary rearward thrust of the cartridge case.5
  • The Rear Trunnion: This machined steel block provides the mounting point for the buttstock and serves as the rear stop for the recoiling bolt carrier group, absorbing its kinetic energy at the end of each cycle.1

The thin stamped receiver acts as a chassis, holding these trunnions and the fire control group in their correct spatial relationship. The rivets are the non-detachable fasteners that permanently join the high-strength trunnions to the receiver shell, transferring the operational loads and creating a unified, rigid structure from otherwise disparate parts.1 Alternative methods like screwing are unsuitable due to the risk of loosening under intense vibration, while welding could warp the thin receiver and create brittle heat-affected zones.7 Riveting provides a permanent, vibration-resistant, and mechanically sound solution.

1.3 System Overview: Mapping the Primary Rivet Groups

The rivet pattern on an AKM is not arbitrary; it is a carefully laid out system designed to secure components and reinforce the receiver. The primary rivet groups, which will be analyzed in detail in subsequent sections, are as follows 8:

  • Front Trunnion Rivets: A group of six rivets securing the front trunnion to the forward section of the receiver.
  • Rear Trunnion Rivets: Two long rivets (for a standard fixed stock) that pass through the receiver and the rear trunnion block.
  • Trigger Guard Rivets: A group of five rivets that attach the trigger guard assembly to the bottom of the receiver.
  • Center Support Rivet: A single rivet and internal sleeve located midway down the receiver that prevents the receiver walls and guide rails from flexing.

The precise placement of these rivets is critical to the firearm’s function and is standardized across Warsaw Pact production, as can be seen in various build templates and diagrams.10

Top: AKMS (older-style wood handguard typical of AK-47 fitted) with type IV receiver; bottom: AK-47 with type II receiver. Image Source: Wikimedia.

Section 2: A Typology of AKM Rivets: Form, Dimensions, and Location

The rivet set used in an AKM is not a homogenous collection of fasteners. It is a specific kit of components where the geometry and dimensions of each rivet type are engineered for its designated location and mechanical function.

2.1 Rivet Geometry: A Detailed Taxonomy

The rivets used in a standard AKM can be classified into several distinct geometric types, each with a specific purpose.

2.1.1 The Swell Neck Rivet

This is the most specialized and structurally critical rivet in the AKM design. Its geometry features a standard domed head, a shank of a specific diameter, and a distinctive conical flare, or “swell,” located directly beneath the head.9 This swell is designed to fit into a corresponding dimpled (countersunk) hole in the receiver sheet. This interface creates a mechanical interlock that provides superior resistance to shear forces, a concept that will be analyzed in detail in Section 4. These are used in the highest-stress locations, such as the trunnion attachments.8

2.1.2 The Domed (Universal) Head Rivet

This is a standard solid rivet with a semi-spherical head, often referred to as a universal or round head type.15 These are used in locations where the specialized shear-resisting properties of the swell neck are not required, but a secure clamping force is still necessary, such as the upper front trunnion holes and parts of the trigger guard assembly.9

2.1.3 The Flat Head Rivet

The center support rivet is unique in that it features a very low-profile, flat manufactured head.8 This is a design constraint dictated by clearance requirements. The bolt carrier group reciprocates along guide rails inside the receiver, and a standard domed rivet head in this location would interfere with its movement. The flat head ensures a smooth, unobstructed path for the carrier.18

2.2 Rivet Specifications by Location

The following table synthesizes data from military specifications, gunsmithing resources, and commercial rivet sets to provide a comprehensive reference for the dimensions and types of rivets used in a standard fixed-stock AKM. All imperial measurements have been converted to metric for engineering consistency.

Table 2.1: AKM Rivet Dimensional and Type Specification

Rivet LocationQuantityRivet Type/ShapeShank Ø (mm)Shank Length (mm)Factory Head Ø (mm)Factory Head Height (mm)Required Receiver Hole Ø (mm)
Front Trunnion, Lower2Swell Neck, Domed Head4.09.5~7.1~2.14.0
Front Trunnion, Middle2Swell Neck, Domed Head4.09.5~7.1~2.14.0
Front Trunnion, Upper2Standard, Domed Head4.09.5~7.1~2.14.0
Rear Trunnion, Long2Swell Neck, Domed Head4.8~50.8~7.4~2.84.8
Trigger Guard, Front4Standard, Domed Head4.09.5~6.9~2.14.0
Trigger Guard, Rear1Standard, Domed Head4.07.9~6.9~2.14.0
Center Support1Standard, Flat Head4.0Varies~7.0Low Profile4.0

Data compiled and converted from sources.9 Dimensions are nominal and may exhibit minor variations based on country of origin and production year. Shank length for the center support rivet varies with the sleeve used. Rear trigger guard rivet length can vary depending on the use of a reinforcement plate.17

2.3 Analysis of National and Historical Variations

While the core Soviet design established the standard, minor variations in rivet specifications and patterns exist among different national producers of the AKM and its derivatives.

One of the most well-documented distinctions is in the front trunnion rivet pattern. Soviet/Warsaw Pact AKMs (Russian, Polish, Romanian, etc.) feature a parallel vertical alignment of the three rivets on each side of the trunnion. In contrast, many Chinese Type 56 rifles utilize a staggered or triangular rivet pattern for the front trunnion.12

Furthermore, small dimensional differences in the rivets themselves have been observed. For example, measurements of demilled kits have shown that Romanian factory-formed rivet heads for the trigger guard average around 6.9 mm – 7.2 mm in diameter, while Chinese examples can be slightly larger, averaging around 7.4 mm in diameter with a greater head height.15 These differences, while minor, reflect distinct manufacturing practices and tooling but do not alter the fundamental engineering principles of the riveting system.

Section 3: Metallurgy and Material Science of Soviet-Era Rivets

The choice of material for the AKM’s rivets is a critical aspect of its design, reflecting a deliberate balance between manufacturability, strength, and cost. The material must be soft enough to be formed without fracture, yet strong enough in its final state to withstand the violent operational stresses of the firearm.

3.1 Material Composition: Analysis of GOST Standard Low-Carbon Steels

Based on an analysis of Soviet-era general-purpose fastener standards, such as GOST 10299-80, the rivets used in the AKM are made from a low-carbon, unalloyed, quality structural steel.20 These steels are not high-performance alloys but are cost-effective, readily available, and possess the specific mechanical properties required for cold-forming applications. The two most probable grades are

Сталь 10 (Steel 10) and Сталь 20 (Steel 20).20 The number in the designation indicates the average carbon content in hundredths of a percent (i.e., 0.10% for Steel 10, 0.20% for Steel 20).22

Table 3.1: Nominal Chemical Composition of Soviet Rivet Steels (GOST 1050)

ElementSymbolSteel 10 (% Content)Steel 20 (% Content)
CarbonC0.07 – 0.140.17 – 0.24
ManganeseMn0.35 – 0.650.35 – 0.65
SiliconSi0.17 – 0.370.17 – 0.37
PhosphorusP≤ 0.035≤ 0.035
SulfurS≤ 0.040≤ 0.040
ChromiumCr≤ 0.15≤ 0.25
NickelNi≤ 0.25≤ 0.30
CopperCu≤ 0.25≤ 0.30
IronFeBalanceBalance

Data compiled from sources.22

3.2 Mechanical Properties: The Engineering Balance of Malleability and Strength

The selection of low-carbon steel is a masterstroke of process-integrated engineering. The material’s properties are ideally suited for both the installation process and the final application.

  • Malleability and Ductility: The extremely low carbon content makes these steels very soft and ductile in their annealed (as-supplied) state. For Steel 10, the hardness is approximately 143 HB, and for Steel 20, it is around 163 HB.22 This high ductility allows the rivet’s shank to be cold-formed (upset) into the buck-tail or formed head with a press, flowing to fill the hole completely without cracking.25 A harder, higher-carbon steel would be too brittle for this process.
  • Work Hardening and Final Strength: While the rivets are initially soft, the process of cold-forming induces significant work hardening (also known as strain hardening). As the steel is plastically deformed, dislocations are generated and rearranged within its crystal structure, which impedes further deformation. This has the effect of increasing the material’s tensile strength and hardness in its final, installed state. The rivet becomes substantially stronger than it was before installation. This elegant mechanism means that the assembly process itself is the final step in achieving the required mechanical properties, eliminating the need for a separate, costly heat treatment cycle for the millions of rivets produced.

3.3 Heat Treatment and Surface Finishing

It is critical to distinguish between the treatment of the rivets and the treatment of the receiver. The rivets themselves are not heat-treated after installation.27 Their final strength is a product of material selection and work hardening.

In contrast, the 1.0 mm stamped receiver is selectively heat-treated. Specifically, the areas around the fire control group (hammer and trigger) pin holes and the tip of the integral ejector are hardened to prevent wear and elongation under repeated stress.4 A common specification for this spot-hardening is a Rockwell C hardness of 38-40.13 Attempting to use a non-heat-treated receiver will result in rapid failure, as the pin holes will stretch and deform, leading to malfunction.13

The standard finish applied to military-issue rivets is a black oxide coating.9 This is a conversion coating that provides mild corrosion resistance and a durable, non-reflective black finish that matches the rest of the firearm.

Section 4: Engineering Rationale and Stress Distribution Analysis

The AKM’s riveting system is more than a simple collection of fasteners; it is an integrated system designed to manage and distribute the complex forces generated during the firing cycle. Understanding this system requires analyzing the stresses on the primary components and the specific design features created to handle them.

4.1 The Trunnions as Primary Load-Bearing Structures

As established, the trunnions are the true load-bearing elements of the AKM.

  • Front Trunnion Stress: The front trunnion bears the highest peak stress in the system. When a cartridge is fired, the expanding gases exert a force on the bolt face, which is transmitted directly to the locking lugs on the front trunnion. This force is on the order of thousands of pounds, corresponding to chamber pressures that can reach approximately 45,000 psi for the 7.62x39mm cartridge.5 The integrity of the trunnion’s locking lugs is paramount. This is why properly forged and heat-treated trunnions are essential; failures of substandard cast trunnions often manifest as cracks or complete shearing of the locking lugs.5
  • Rear Trunnion Stress: The rear trunnion experiences a different type of load: a high-energy impact. At the end of its rearward travel, the entire mass of the bolt carrier group (approximately 500 grams) slams into the front face of the rear trunnion. While the peak force is lower than the chamber pressure, it is a significant, repetitive shock load that must be absorbed and transferred into the receiver shell without causing deformation or failure.7 This repeated impact is why the rear trunnion rivets are often described as taking the most “abuse” in the system.7

4.2 Analysis of Forces: Shear Stress on Trunnion Rivets

The primary force that the trunnion rivets must resist is shear. The rearward thrust on the front trunnion and the impact on the rear trunnion create forces that try to slide the trunnions relative to the receiver skin. The rivets act as pins, resisting this shearing motion. The load is distributed among the rivets in a group, with each rivet carrying a fraction of the total shear force.

4.3 The Swell Neck/Dimple Interface: A Design Solution for Maximizing Shear Resistance

The most ingenious feature of the AKM’s riveting system is the use of swell neck rivets in conjunction with dimpled receiver holes. This is a specific design solution to the problem of transferring high shear loads into a thin (1.0 mm) sheet of metal.

In a standard rivet joint, the shear load is borne by the bearing surface of the hole against the rivet shank. In a 1.0 mm receiver, this bearing area is minuscule, making the hole highly susceptible to elongation or “egging” under load, which would lead to a loose trunnion and catastrophic failure.

The swell neck/dimple system fundamentally changes this dynamic. The process involves using a specialized die to press a conical countersink, or “dimple,” into the receiver hole.8 The front or rear trunnion must be in place behind the receiver to support the sheet during this process.8 When the swell neck rivet is installed, its conical swell nests perfectly into this dimple.13

This creates a mechanical interlock. The shear load is no longer concentrated on the thin edge of the hole. Instead, it is distributed across the entire conical surface area of the dimple. This vastly increases the bearing surface, dramatically reduces the bearing stress on the receiver material, and effectively locks the trunnion and receiver together, preventing any relative movement.6 Gunsmithing guides explicitly warn against trying to achieve a flush fit by removing material from the receiver instead of dimpling; doing so defeats the entire purpose of the design, leaving only the rivet’s core to resist shear and guaranteeing eventual failure.6 This feature is the key to making a thin stamped receiver perform as if it were much thicker and stronger at these critical junctions.

4.4 The Role of the Center Support and Trigger Guard Rivets in Receiver Rigidity

While the trunnion rivets handle the primary firing loads, the other rivet groups serve a crucial structural reinforcement role, stiffening the inherently flexible U-shaped receiver.

  • Center Support: The center support consists of a rivet passing through a steel sleeve that bridges the two sides of the receiver.8 This assembly acts as a critical cross-member. It prevents the long, unsupported upper guide rails from flexing inward under the lateral forces exerted by the reciprocating bolt carrier, ensuring smooth and reliable cycling. It also prevents the receiver walls themselves from bowing or pinching.33
  • Trigger Guard Assembly: The trigger guard is not merely a safety feature. When its five rivets are properly installed, the entire stamped steel trigger guard assembly acts as a structural floor plate for the receiver.34 This significantly increases the torsional and latitudinal rigidity of the large magazine well opening, preventing the “U” from spreading or twisting under load.

Together, these rivet groups transform the flexible stamped receiver shell into a strong, cohesive chassis capable of withstanding the rigors of military service.

Section 5: The Riveting Process: A Technical Guide to Proper Formation

Achieving the designed strength of the AKM’s riveted joints is entirely dependent on the correct installation process. This is a precision manufacturing operation that requires specialized tooling and meticulous adherence to procedure. Using improper methods, such as a hammer and a simple punch, will result in substandard joints that compromise the safety and reliability of the firearm.

5.1 Essential Tooling: Jigs, Presses, and Forming Dies

Modern, correct riveting practice relies on a set of specialized tools to ensure control and repeatability.

  • Hydraulic Press: A shop press, typically with a capacity of 12 tons or more, provides the slow, controlled, and immense force needed to properly form the rivets without impact shock.13
  • Riveting Jig: A purpose-built jig, such as those made by AK-Builder or Toth Tool, is essential. These jigs securely hold the receiver and trunnion assembly, ensuring it is square to the press ram. They have recesses to support the manufactured head of the rivet, preventing it from being flattened, and they align the forming tool perfectly coaxial with the rivet shank.8 Different jigs or configurations are used for short trunnion rivets, long rear trunnion rivets, and the trigger guard.33
  • Forming Dies and Tools: A set of hardened steel forming tools is used to shape the rivet. This includes cupped support dies for the manufactured head and various forming punches to create a correctly shaped, domed buck-tail on the other end.16

5.2 Receiver and Component Preparation

Proper preparation of the components is as important as the riveting itself.

  • Hole Location and Drilling: Rivet holes must be precisely located on the receiver blank. This is typically done using a plastic layout guide and a transfer punch to mark the hole centers.10 The holes are then drilled to the correct diameter (e.g., 4.0 mm for a 4.0 mm rivet) using a drill press and high-quality drill bits.37 An undersized hole will prevent the rivet from seating, while an oversized hole will result in a weak joint.
  • Deburring: After drilling, all holes must be carefully deburred on both sides. Any burrs or sharp edges will prevent the rivet from sitting flush against the receiver and trunnion, creating gaps that compromise the joint’s integrity.6
  • Dimpling: For all swell neck rivet locations, the receiver holes must be dimpled. This is done using a specialized dimple die in the hydraulic press, with the trunnion installed in the receiver to provide backing support. This forms the conical seat that the rivet’s swell neck will engage.8

5.3 Step-by-Step Installation Protocol

The general sequence for riveting an AKM receiver is as follows, using the appropriate jigs and press tools for each step 8:

  1. Trigger Guard Riveting: The trigger guard assembly is typically installed first, often with a dedicated jig. The four front rivets and the single rear rivet are pressed to secure the guard and magazine catch assembly.13
  2. Front Trunnion Riveting: The front trunnion is placed in the receiver, and the six short rivets are installed. Care must be taken to use swell neck rivets in the four lower and middle holes (which should be dimpled) and standard domed rivets in the two upper holes.8
  3. Rear Trunnion Riveting: The rear trunnion is installed using the two long rivets. This requires a specialized long-rivet jig to support the receiver and apply force linearly down the long shank of the rivet.8
  4. Center Support Installation: The center support sleeve is inserted, and the special flat-headed rivet is pressed into place, again using the long-rivet tool.8

5.4 Inspection and Verification of a Correctly Formed Rivet

A properly formed rivet must meet specific visual and mechanical criteria.

  • Visual Inspection: The manufactured head must be perfectly flush against the receiver surface with no visible gaps. A common field test is to hold the receiver up to a bright light source to check for light passing under the rivet head.39 The formed head (the buck-tail) must be symmetrical, well-rounded with a dome shape similar to the manufactured head, and centered on the rivet’s shank. It should not be flattened, cracked, or off-center.40
  • Mechanical Integrity: The finished rivet must be completely tight. There should be absolutely no detectable movement between the trunnion and the receiver when force is applied. The entire assembly should feel and behave as a single, monolithic component. A loose rivet is a failed rivet and must be drilled out and replaced.
This is a Romanian Pistol Mitralieră model 1963/1965 (abbreviated PM md. 63 or simply md. 63) and is the Patriotic Guard or ‘Gardă’ version readily identifiable by the “G” on the rear sight block. Image source: Author.

Section 6: Conclusion: The Engineering Elegance of the AKM Riveting System

6.1 Synthesis of Findings: A Robust System for a Stamped Platform

The comprehensive analysis of the AKM’s riveting system reveals a design that is far more sophisticated than its rugged appearance suggests. The transition from the milled AK-47 to the stamped AKM was a manufacturing revolution, and the riveting system is the lynchpin of its success. The key findings of this report can be synthesized as follows:

  • A Purpose-Engineered System: The AKM’s riveting system is a holistic solution to the engineering challenges posed by a thin, stamped-steel receiver. It successfully mates high-strength, load-bearing trunnions to a lightweight chassis, creating a firearm that is both durable and easy to mass-produce.
  • Specialized Components: The system does not rely on generic fasteners. It employs a heterogeneous set of rivets, each with a specific geometry (swell neck, domed head, flat head) and dimension precisely tailored to the mechanical requirements and spatial constraints of its location.
  • Optimized Material Science: The choice of low-carbon steel (such as Soviet Steel 10 or 20) is a deliberate act of engineering efficiency. The material’s initial ductility facilitates easy cold-forming, while the installation process itself induces work-hardening, providing the final required strength without the need for a separate heat-treatment process.
  • Advanced Structural Mechanics: The strength of the system is derived not merely from the clamping force of the rivets but from advanced mechanical principles. The swell neck/dimple interface is a brilliant solution for managing shear stress, while the center support and trigger guard rivets act as integral structural reinforcements, adding critical rigidity to the receiver.
  • Process-Dependent Integrity: The design’s success is inextricably linked to the correct installation methodology. Proper riveting is a precision process that requires specialized tooling and meticulous preparation. Deviations from this process directly compromise the mechanical integrity and safety of the firearm.

6.2 Final Assessment

The riveting system of the AKM is a testament to the Soviet design philosophy of elegant simplicity. It achieves maximum functional robustness with a minimum of manufacturing complexity and cost. By understanding the interplay between the stamped receiver, the machined trunnions, and the specialized rivets that join them, one can appreciate the AKM not just as a firearm, but as a masterclass in pragmatic and effective mechanical engineering. It is a system where every component, every dimension, and every step in the assembly process has a clear and logical purpose, resulting in one of the most successful and widely produced firearm designs in history.

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  39. Things To Look For When Buying A New AK – Thinline Weapons Wiki, accessed June 20, 2025, https://thinlineweapons.com/wiki/index.php/Things_To_Look_For_When_Buying_A_New_AK
  40. Easy AK47 Build “Homemade”: Front trunnion riveting ~ Step 2 of 6 – YouTube, accessed June 20, 2025, https://www.youtube.com/watch?v=MegvQzASrr4&pp=0gcJCdgAo7VqN5tD
  41. AK-47 Loose Rivet Rebuild Part 1 – YouTube, accessed June 20, 2025, https://www.youtube.com/watch?v=f7qKa_yhEtw
  42. Комплект заклепок для боковых планок, Тула – Прицелы ПУ, accessed June 20, 2025, https://puscopes.ru/product/komplekt-zaklepok-dlya-bokovyh-planok-tula/
  43. Марка 10 – ТД «СпецСталь». Свойства, характеристики и применение, accessed June 20, 2025, https://tdspecstal.ru/assortment/spetsialnye-stali-i-splavy/10/
  44. Сталь 10 в России – характеристики, аналоги, свойства, accessed June 20, 2025, https://metatorg.ru/marki-stali-i-splavy/stal_konstruktcionnaya/stal_konstruktsionnaya_uglerodistaya_kachestvennaya/stal_konstruktsionnaya_uglerodistaya_kachestvennaya_10/
  45. Сталь 20: свойства, характеристики, аналоги – Метинвест-СМЦ, accessed June 20, 2025, https://metinvest-smc.com/ru/steel/stal-20/

AISI 1020 Low Carbon/Low Tensile Steel – AZoM, accessed June 20, 2025, https://www.azom.com/article.aspx?ArticleID=6114


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Want to trigger me? Call a Romanian PSL a Dragunov!

I guess we all have our pet peves. One of my many irks is when people call a Romanian PSL rifle a “Dragunov”. I see it all the time on Facebook and GunBroker. Honestly, it bugs the hell out of me. The PSL is an oversized AK for all intents and purposes. The Dragunov is a brilliant Designated Marksman Rifle (DMR) that is it’s own creature. With that said, let’s take a look at the two.

I. Executive Summary

The Russian SVD Dragunov and the Romanian PSL are both iconic semi-automatic rifles chambered in the 7.62x54mmR cartridge, designed to serve as Designated Marksman Rifles (DMRs) within Eastern Bloc military doctrines. A common misconception persists that the PSL is merely a direct clone or licensed variant of the SVD. However, a detailed examination reveals that while they share a similar operational role and external appearance, they are fundamentally distinct in their mechanical design and underlying philosophical approaches to firearms development.1

Figure 1. This is a Russian Dragunov. Note the sleek lines, long handguard, milled receiver, and lack of a protruding rear sight block compared to a PSL. (Obtained from Wikimedia)

The SVD, or Snayperskaya Vintovka Dragunova, emerged from a dedicated design competition in the Soviet Union, resulting in a purpose-built platform featuring a short-stroke gas piston system and a precisely machined (milled) steel receiver.3 This design reflects a focus on refinement, optimized performance, and a balance between accuracy and battlefield mobility for a squad-level marksman.7 In contrast, the Romanian PSL, or Puşcă Semiautomată cu Lunetă, was developed independently due to geopolitical tensions and Romania’s desire for self-sufficiency in arms production.1 It is essentially a scaled-up and reinforced adaptation of the Kalashnikov/RPK light machine gun platform, utilizing a long-stroke gas piston and a stamped steel receiver.1 This approach prioritized ruggedness, reliability, and cost-effective mass production over the SVD’s more complex and expensive manufacturing processes.9

Figure 2. This is a PSL. Note the different flash hider, gas block, hand guards, rear sight block, stamped steel magazine, magazine stampong and buttstock design compared to the Dragunov. (Obtained from Wikimedia)

These fundamental differences in design philosophy and mechanical execution lead to varied performance characteristics, particularly in terms of inherent accuracy and sustained fire capability. While both rifles are designed for engaging man-sized targets at extended ranges, the SVD generally exhibits a higher standard of quality control and consistent accuracy, whereas the PSL, though robust and reliable, may require aftermarket modifications to maximize its precision potential.10 The distinction between these two rifles is not merely academic; it highlights how military doctrine, political autonomy, and industrial capabilities shape the development of firearms, leading to distinct solutions for similar operational requirements.

II. Introduction: The Role of Designated Marksman Rifles

The evolution of infantry combat in the mid-20th century revealed a critical gap in the capabilities of standard small arms. While assault rifles, such as the ubiquitous AKM, proved highly effective for close-to-medium range engagements, typically up to 300-400 meters, targets appearing beyond this distance often remained unengaged or required specialized, slower-firing bolt-action sniper rifles.1 This tactical void necessitated an intermediate class of firearm: the Designated Marksman Rifle (DMR).

DMRs are designed to bridge this gap, providing infantry squads or platoons with an organic capability for increased effective range and precision without resorting to highly specialized sniper teams. Their primary function is to enable engagement of targets beyond the capabilities of standard issue assault rifles, typically out to 600-800 meters, while maintaining a semi-automatic rate of fire to support dynamic battlefield scenarios.1 This role emphasizes “combat accuracy”—the ability to consistently hit man-sized targets quickly and effectively—rather than the extreme sub-Minute of Angle (MOA) precision often associated with Western sniper rifles.8

The SVD Dragunov and the Romanian PSL stand as two prominent and historically significant examples of this DMR concept, both emerging from the Cold War era to fulfill similar roles within their respective military doctrines. Their development paths, however, diverged significantly, offering a compelling study in firearm design and geopolitical influence.

III. Historical Development and Design Philosophy

A. The SVD Dragunov: Soviet Precision and Doctrine

The SVD Dragunov’s genesis lies in a Soviet military requirement for a new self-loading sniper rifle, initiated through competitive trials spanning from 1958 to 1963.6 This was the third significant attempt to equip Soviet infantry with such a weapon, following earlier efforts like the SVT-40.20 The competition ultimately saw the design by Yevgeny Dragunov emerge victorious, leading to its official adoption on July 3, 1963.6 Dragunov’s background as a factory machinist, senior armorer, and a competitive shooter with extensive experience in sports and target rifle design proved instrumental.20 His unique perspective, honed from years of working with and competing in precision shooting, allowed him to approach the challenge with a fundamentally different philosophy than his competitors, who were more rooted in automatic combat weapon design.20

The core design philosophy behind the SVD was not to create a Western-style, extreme-precision sniper rifle, but rather a Designated Marksman Rifle (DMR) optimized for “combat accuracy”.8 This meant prioritizing the ability to score effective hits on man-sized targets rapidly, even against moving targets in dynamic battle scenarios, rather than achieving the absolute maximum possible accuracy.18 This doctrinal approach had a profound impact on the SVD’s design choices. For instance, the rifle was initially designed with a relatively thin, “pencil-profile” barrel to save weight, enhancing the marksman’s maneuverability and ability to keep pace with an infantry squad.6 While this design choice compromised some inherent accuracy, it aligned with the Soviet emphasis on a lightweight weapon system for squad support.8 Later, the modernized SVDM variant would feature a heavier barrel to enhance rigidity and harmonics, thereby improving accuracy, indicating a continuous refinement process.7

Another significant design decision reflecting this doctrine was the change in rifling twist rate. Originally, the SVD featured a 320 mm (1:12.6 in) twist, optimized for heavier civilian ammunition.6 However, in 1975, this was increased to a standard 240 mm (1:9.4 in) twist. This modification, while reducing precision with the dedicated 7N1 sniper cartridge by approximately 19%, was a deliberate choice to allow for acceptable accuracy when using standard “light” ball steel core LPS Gzh ammunition, which was more readily available for general issue and machine guns.6 This adjustment underscores the Soviet emphasis on logistical commonality and battlefield practicality over achieving peak theoretical precision with specialized ammunition. The SVD’s design, therefore, represents a sophisticated balance of precision, reliability, and battlefield utility, tailored to a specific military doctrine that valued effective fire support at the squad level.

B. The Romanian PSL: An Independent AK-Derived Solution

The development of the Romanian PSL (Puşcă Semiautomată 7,62 mm cu Lunetă) was born out of a unique geopolitical context that diverged from the unified Warsaw Pact arms development strategy. In August 1968, Romania’s President Nicolae Ceaușescu publicly condemned the Warsaw Pact invasion of Czechoslovakia, a move that significantly strained relations with the Soviet Union and solidified Romania’s independent foreign policy.1 This political rift directly influenced Romania’s military industrial complex. To reduce its reliance on Soviet military equipment and foster national self-sufficiency, Romania accelerated the development of its own small-arms production capabilities.1

When the Soviets proved hesitant to share the detailed specifications for their SVD Dragunov, Romania embarked on an independent project to develop its own semi-automatic designated marksman rifle.9 The PSL was officially launched in 1974, leveraging Romania’s existing and well-established small-arms manufacturing infrastructure.1 Critically, instead of attempting to reverse-engineer or replicate the SVD’s complex, purpose-built design, Romanian engineers opted for a pragmatic approach: adapting a proven domestic platform. The PSL’s design is fundamentally based on the PM md. 64 light machine gun, which itself was a licensed copy of the Soviet RPK, an enlarged variant of the AKM.1 This means the PSL belongs to the Kalashnikov family of weapons, sharing many of its core operational principles.17

The Romanian design priorities for the PSL emphasized ruggedness, reliability, and cost-effective mass production.9 Unlike the SVD’s milled receiver, the PSL utilizes a stamped sheet steel receiver, similar to the RPK, but reinforced with a “bulged” front trunnion to accommodate the more powerful 7.62x54mmR cartridge.1 This choice of stamped construction made the PSL cheaper and easier to mass-produce compared to the SVD’s more labor-intensive milled design.9 The internal mechanism, being familiar to troops trained on AK-pattern rifles, also meant a shorter training period for designated marksmen.17 The PSL’s development therefore stands as a compelling illustration of how political autonomy and economic realities can drive distinct military hardware solutions, even when fulfilling a similar operational role and sharing a common cartridge type. The result is a robust, reliable, and widely distributed rifle that, while cosmetically similar to the SVD, is mechanically a different weapon system.

IV. Technical Specifications and Mechanical Differences

Despite their superficial resemblance and shared 7.62x54mmR cartridge, the SVD Dragunov and Romanian PSL exhibit profound mechanical differences that stem from their distinct design philosophies and manufacturing approaches. These divergences impact everything from their internal operation to their accuracy potential and logistical considerations.

A. Operating Mechanism and Receiver Design

The most fundamental mechanical distinction between the SVD and PSL lies in their operating mechanisms and receiver construction. The SVD employs a short-stroke gas piston system.3 In this design, a separate gas piston impacts a pusher, which in turn drives the bolt carrier rearward, but the piston itself does not travel the full length of the receiver with the bolt carrier.3 This approach minimizes the mass of reciprocating parts, contributing to reduced felt recoil and potentially better accuracy by reducing the disturbance to the rifle’s harmonics during the firing cycle.3 The SVD’s receiver is precisely machined from a solid block of steel (milled), providing a rigid and stable platform for the barrel and operating components.2 This manufacturing method, while more costly and time-consuming, enhances the rifle’s inherent precision and durability.

In stark contrast, the PSL utilizes a long-stroke gas piston system, a hallmark of the Kalashnikov family of weapons.1 In this system, the gas piston is permanently attached to the bolt carrier, and the entire assembly travels the full length of the receiver during the operating cycle. While this design is renowned for its exceptional reliability and robustness, it involves a larger and heavier mass of reciprocating parts, which can introduce more vibration and impact accuracy, particularly during rapid fire.10 The PSL’s receiver is constructed from stamped sheet steel, similar to the RPK light machine gun, but it is “beefed up” and reinforced, particularly at the front trunnion, to handle the more powerful 7.62x54mmR cartridge.1 This stamped construction is significantly less expensive and faster to produce than a milled receiver, aligning with Romania’s emphasis on mass production and cost-effectiveness. The choice of these differing core mechanical architectures highlights the distinct design philosophies: the SVD as a purpose-built precision instrument, and the PSL as a pragmatic, robust adaptation of an existing, reliable platform.

B. Barrel Characteristics

Both rifles feature chrome-lined bores, a common practice in Eastern Bloc firearms to enhance corrosion resistance and extend barrel life, especially when using corrosive surplus ammunition.6 However, their barrel profiles and rifling twist rates present notable differences impacting accuracy.

The original SVD was designed with a relatively thin, “pencil-profile” barrel to minimize overall weight, a crucial consideration for a rifle intended for squad-level mobility.6 While this contributed to a lighter weapon, it inherently limited the barrel’s rigidity and its ability to dissipate heat effectively during sustained firing, which can negatively affect accuracy. Recognizing this, later modernized variants like the SVDM incorporated a heavier barrel profile to enhance rigidity and improve barrel harmonics, thereby boosting accuracy.7 The SVD’s rifling twist rate also saw an evolution. Initially, it was 320 mm (1:12.6 in), optimized for heavier civilian ammunition.6 However, in 1975, the twist rate was standardized to 240 mm (1:9.4 in). This change, while reportedly reducing precision with the dedicated 7N1 sniper cartridge by 19%, allowed for acceptable accuracy with standard “light” ball steel core LPS Gzh ammunition, reflecting a pragmatic compromise for logistical commonality.6

The PSL also features a chrome-lined barrel, typically with a 1:10 twist rate.9 However, a significant characteristic of the PSL’s barrel is its relatively thin profile.10 This design choice, likely influenced by weight considerations and manufacturing simplicity, has a direct and pronounced impact on its sustained accuracy. Reports indicate that the PSL’s thin barrel heats up rapidly, causing groups to widen considerably after firing as few as 3 to 5 rounds.13 This makes the PSL less suitable for prolonged rapid-fire engagements where consistent precision is paramount, highlighting a practical limitation of its design when compared to the SVD’s more robust barrel characteristics, especially in later variants.

C. Magazine Design and Interchangeability

Both the SVD and PSL are chambered for the same powerful 7.62x54mm Russian rimmed cartridge and are fed from 10-round detachable box magazines.1 This shared ammunition and capacity often leads to the mistaken assumption that their magazines are interchangeable. However, this is a critical point of divergence: the magazines are not interchangeable between the Dragunov and PSL without significant modification.1

This incompatibility stems directly from their fundamentally different receiver designs and internal dimensions. The SVD, being a purpose-built design with a milled receiver, has a magazine well precisely machined to fit its specific magazines. In contrast, the PSL, as an enlarged AK/RPK variant, adapted its magazine well to accommodate its scaled-up Kalashnikov-style internals. Visually, PSL magazines are distinguishable by a characteristic X-shaped pattern stamped on their sides, whereas Russian and Chinese SVD magazines typically feature a waffle-style stamp.1 This seemingly minor detail carries significant logistical implications for military forces or civilian users who might operate both rifle types, as it necessitates separate supply chains for magazines despite the shared ammunition. The non-interchangeability of magazines serves as a tangible illustration of the deep mechanical differences between the two platforms, reinforcing that the PSL is not simply a “Romanian Dragunov” but a distinct weapon system.

D. Optics and Mounting Systems

Both the SVD and PSL were designed to be used primarily with optical sights, reflecting their role as designated marksman rifles. They share a common philosophy of side-mounted optics, a characteristic of Eastern Bloc firearms, which allows for the use of iron sights even when the optic is mounted.18

The SVD is typically issued with the PSO-1 (or later PSO-1M2) optical sight.3 This 4x magnification scope features a distinctive reticle that includes a stadiametric rangefinder for estimating target distance, chevrons for bullet drop compensation (BDC) at various ranges, and horizontal marks for windage adjustments.22 The PSO-1 is designed to mount to a Warsaw Pact rail on the left side of the SVD’s receiver. This mounting system is engineered to allow for the optic’s removal and reattachment without a significant loss of zero, a crucial feature for field maintenance and transport.18 The SVD’s milled receiver provides a robust and stable base for this rail, contributing to consistent optic performance.

The PSL is typically equipped with the LPS 4×6° TIP2 scope (Lunetă Pușcă Semiautomată Tip 2).1 This optic is a simplified version of the Russian PSO-1, sharing a similar basic design, 4x magnification, and the distinctive stadiametric rangefinder and BDC reticle features.1 It also mounts to a riveted side rail on the left side of the PSL’s stamped receiver.1 While the shared design philosophy of integrated rangefinding and BDC aims for rapid target engagement without complex calculations, there can be differences in optical quality and consistency. Some reports indicate that the LPS optics found on PSLs may be “dim and hazy” compared to the PSO-1.4 The PSL’s riveted rail on a stamped receiver, while functional, may not offer the same inherent rigidity and stability as the SVD’s integrated rail on a milled receiver, potentially impacting the consistency of zero retention over time, though the side rail concept itself is designed for repeatable mounting.18 The differences in optical quality and mounting stability reflect the differing manufacturing standards and the overall refinement levels of each nation’s arms industry.

E. Other Key Distinctions

Beyond the major differences in operating mechanisms, receivers, barrels, and magazines, several other mechanical distinctions contribute to the overall character and performance of the SVD and PSL:

  • Trigger Groups: The SVD features a more refined and easily removable trigger mechanism.3 This design contributes to a smoother and lighter trigger pull, which is beneficial for precision shooting. In contrast, the PSL, being derived from the AK platform, utilizes a fire control group that is more akin to the standard Kalashnikov design.3 While robust and reliable, these triggers are often characterized by a military-grade coarseness, with some creep and grittiness, which can be less conducive to achieving maximum accuracy.10
  • Gas Regulation: The SVD incorporates a two-position adjustable gas regulator.6 This feature allows the operator to fine-tune the gas system to compensate for varying environmental conditions (such as fouling in the gas port, extreme cold, or high altitude) or to optimize performance with different ammunition types. This adjustability helps maintain consistent recoil impulse and reliability. The PSL, however, typically has a non-adjustable gas system.1 This lack of adjustability can lead to issues, particularly when using heavier ammunition (147 grain or greater) or silencers, as the increased gas pressure can cause excessive wear, including bolt carrier cracking.1 To mitigate these issues, aftermarket adjustable gas pistons are a common and recommended modification for PSL owners.1 This difference underscores the SVD’s more optimized design for its cartridge compared to the PSL’s adaptation of an existing platform.
  • Bolt Hold-Open: The SVD features a last-round bolt hold-open mechanism, which keeps the bolt open after the last cartridge in the magazine has been fired.6 This is a valuable feature for military applications as it provides immediate feedback to the operator that the rifle is empty and facilitates faster reloads. While military-specification PSLs generally incorporate this feature, some civilian import versions may lack it due to modifications made to comply with import laws.1

These cumulative differences highlight the engineering trade-offs inherent in each design. The SVD’s features reflect a commitment to optimizing performance and adaptability for its specific role, while the PSL’s design reflects a pragmatic approach of adapting existing, proven technology, even if it means some inherent limitations or the need for user-level modifications to achieve optimal performance.

V. Performance Analysis: Accuracy and Operational Range

The performance of the SVD Dragunov and Romanian PSL is best understood within the context of their intended role as Designated Marksman Rifles, rather than traditional precision sniper rifles. Both were designed for “combat accuracy”—the ability to consistently hit man-sized targets in dynamic battlefield conditions—rather than achieving minute-of-angle (MOA) groups typically expected from dedicated Western sniper platforms.9

A. Accuracy at 500 meters and 1,000 meters

Evaluating the accuracy of these rifles at 500 and 1,000 meters requires distinguishing between factory specifications, optimal conditions with match-grade ammunition, and practical performance with standard military ball ammunition.

SVD Dragunov Accuracy:

Factory inspection requirements for the SVD were stringent for its class, mandating a median deviation of no more than 0.7 MOA in three 10-shot groups when using the dedicated 7N1 sniper ammunition.6 This translates to an approximate overall accuracy of 3 MOA under factory test conditions.6 More specifically, with 7N1 sniper cartridges, the extreme vertical spread was required to be no more than 1.24 MOA (with a 240 mm twist rate barrel) or 1.04 MOA (with a 320 mm twist rate barrel) in 5-shot groups.22 However, when using standard 57-N-323S cartridges (light ball), the precision of the SVD is notably reduced to approximately 2.21 MOA extreme vertical spread.22 U.S. military tests and Soviet technical bulletins further indicate a requirement for the SVD to hold a 14.7-inch group at 600 meters (approximately 2.3 MOA) with standard ball ammunition.19 This level of accuracy is considered acceptable for engaging man-sized targets at these distances. While the SVD can achieve hits at 1,000 meters, its design is not optimized for consistent precision at such extreme ranges. An experimental prototype, the SVK, chambered in 6x49mm, was developed to offer nearly a fourfold accuracy improvement over the SVD at 1,000 meters, underscoring the SVD’s inherent limitations at that distance.7

Romanian PSL Accuracy:

The PSL is often cited as being capable of 1 Minute of Angle (MOA) or less under ideal conditions.1 However, this potential is frequently hampered by practical limitations. A significant issue is the PSL’s relatively thin barrel, which heats up quickly, causing groups to widen considerably after only 3 to 5 rounds.13 This makes sustained precision fire challenging. Furthermore, the lack of an adjustable gas system can lead to issues like bolt carriers cracking when using heavier ball (147 grain or greater) ammunition or suppressors, due to excessive gas pressure.1 Despite these challenges, with proper tuning, such as the installation of an aftermarket adjustable gas piston (like the KNS piston), and selection of specific ammunition (e.g., 150-grain or 180+ grain loads), the PSL has demonstrated the capability to make 500-yard shots with ease, with some reports indicating its accuracy can be “on par with the Drag”.12 It is consistently emphasized that the PSL, like the SVD, is a DMR intended for hitting man-sized targets, not a precision competition rifle.9 For example, tests at 300 yards showed the PSL capable of a 10-shot rapid-fire group, and with specific match ammunition, it could achieve groups near 1.5 MOA.11

Comparative Assessment:

At 500 meters, both rifles are capable of engaging man-sized targets. The SVD, particularly with 7N1 sniper ammunition, is generally more consistently accurate out of the box due to its higher quality control and more refined design.10 Its factory specifications and military requirements suggest a reliable capability for hits within 2-3 MOA at this range.19 The PSL, while capable of similar or even better initial accuracy with optimal ammunition and tuning, suffers from rapid barrel heating, which significantly degrades its sustained accuracy after a few shots.13 Therefore, for a single, well-aimed shot at 500 meters, both can perform, but the SVD offers greater consistency across multiple shots and varying ammunition types without modifications.

At 1,000 meters, neither rifle is considered a true precision sniper rifle in the Western sense. While their optical sights (PSO-1/LPS) have bullet drop compensation markings up to 1,000 meters or beyond, and their cartridges possess the ballistic energy to reach these distances, achieving consistent, precise hits on man-sized targets becomes significantly more challenging.1 The SVD’s limitations at 1,000 meters are acknowledged by the development of the SVK prototype, which aimed for a fourfold accuracy improvement at this range.7 For the PSL, its thin barrel and inherent design limitations make consistent accuracy at 1,000 meters highly improbable without extensive modifications and specialized ammunition, even then it would be considered an extreme shot.10 In practical terms, neither rifle is reliably accurate for precision work at 1,000 meters, though engaging area targets or suppressing fire might be possible.

B. Realistic Operational Range

The realistic operational range for a designated marksman rifle is the distance at which a trained operator can consistently achieve effective hits on typical battlefield targets (e.g., a man-sized silhouette) under combat conditions.

SVD Dragunov:

The SVD’s sighting systems are graduated for considerable distances: 1,300 meters with the optical sight and 1,200 meters with the iron sights.27 However, its maximum effective range is widely cited as 800 meters.19 This 800-meter range aligns with Soviet sniping doctrine, which focused on accurate engagement of multiple high-profile targets within this distance.19 The SVD is designed for a muzzle velocity of 830 m/s with standard ammunition.27 The rifle’s “killing range” is theoretically listed at 3,800 meters, but this refers to the maximum projectile flight distance, not effective accuracy.15 For direct fire, the SVD has a direct fire range of 350m for a 30cm head figure, 430m for a 50cm chest figure, and 640m for a 150cm running figure.32

Romanian PSL:

The PSL’s effective firing range is generally stated to be between 800 and 1,000 meters.30 Its LPS 4×6° TIP2 optical sight features bullet drop compensation out to 1,000 meters.1 Similar to the SVD, the PSL has a theoretical maximum firing range (killing effect) of approximately 3,000 to 3,800 meters.15 With a muzzle velocity of 830 m/s using a 10-gram projectile (7N14) 30, its ballistic performance is comparable to the SVD. Romanian military doctrine for the PSL, like the SVD, focused on its role as a squad-level DMR to engage targets beyond the capabilities of standard assault rifles, typically between 400 and 800 meters.15

Conclusion on Operational Range:

Both the SVD and PSL are realistically effective at engaging man-sized targets out to approximately 800 meters under typical battlefield conditions. While their optics and ammunition allow for shots at greater distances, consistent hits on individual targets become increasingly difficult beyond this range due to ballistic limitations, rifle characteristics (like barrel heating in the PSL), and the inherent precision requirements for such shots. Their design and doctrinal role align with providing extended-range fire support within the capabilities of a standard infantry squad, rather than engaging targets at extreme “sniper” distances.

VI. Design Superiority and Practicality

Assessing the “superior design” between the SVD Dragunov and the Romanian PSL is nuanced, as each rifle represents a different set of design priorities and compromises. The determination of superiority often depends on the specific criteria being evaluated: refinement, reliability, manufacturing cost, and maintenance.

Refinement:

The SVD is widely considered the more refined design.2 Its purpose-built nature, featuring a precisely milled receiver and a short-stroke gas piston system, contributes to a smoother operation, reduced reciprocating mass, and better inherent accuracy potential.3 The SVD’s trigger mechanism is also noted for being more refined and easily removable.3 This level of engineering and manufacturing precision typically results in a weapon that feels more “tight” and consistent. The PSL, being an adaptation of the RPK/AKM platform, exhibits a “military-grade coarseness” in its construction.9 While robust, its stamped receiver and long-stroke gas system, though beefed up, operate closer to their mechanical limits when firing the powerful 7.62x54mmR cartridge, leading to less inherent refinement in its action.10

Reliability:

Both rifles are renowned for their reliability, a hallmark of Eastern Bloc small arms designs. The PSL, benefiting from its Kalashnikov heritage, has a well-earned reputation for ruggedness and reliability, performing well even in extreme field environments.10 Its simpler, more robust long-stroke gas system is inherently forgiving of fouling and harsh conditions. The SVD also boasts legendary reliability, having undergone rigorous torture testing in various climatic conditions to ensure flawless performance.42 While the PSL’s non-adjustable gas system can lead to issues with heavy ammunition or suppressors, requiring aftermarket modifications 1, its basic operating reliability remains high. In terms of sheer ability to function under adverse conditions, both are highly dependable, though the PSL’s simplicity might give it a slight edge in raw field ruggedness for the average soldier.

Manufacturing Cost:

The PSL is significantly less expensive to produce than the SVD.9 This cost difference is a direct result of their differing manufacturing methods. The SVD’s milled receiver and more complex, purpose-built components require more machining time and higher material costs.2 In contrast, the PSL’s stamped receiver and adaptation of existing AK/RPK tooling allowed for more cost-effective mass production, a key Romanian design priority.9 This cost advantage made the PSL a more accessible option for many nations and for civilian markets, especially when compared to the scarcity and high price of genuine SVDs.2

Maintenance:

Both rifles are designed for relatively easy field maintenance, a common characteristic of Soviet and Warsaw Pact firearms, often described as “Ivan-proof”.16 Disassembly and reassembly procedures for both are straightforward, allowing for routine cleaning and lubrication in the field.17 The PSL’s AK-derived design means its maintenance procedures are familiar to anyone accustomed to Kalashnikov-pattern rifles.9 The SVD’s trigger group is notably easy to remove for maintenance.3 The adjustable gas system on the SVD also simplifies maintenance by allowing the operator to compensate for fouling or extreme cold.6 While both are robust, the PSL’s inherent simplicity, being an enlarged AK, might be perceived as marginally easier to maintain for a general infantryman without specialized training.

Overall Assessment of Superiority:

There is no single “superior” design; rather, each excels in different areas based on its original intent.

  • The SVD Dragunov is generally considered the superior design in terms of inherent precision, refinement, and optimized performance for its designated role.2 Its purpose-built architecture and higher manufacturing standards contribute to more consistent accuracy and a more refined shooting experience. It represents a dedicated engineering solution to the DMR problem.
  • The Romanian PSL is superior in terms of cost-effectiveness, ease of mass production, and raw rugged reliability.9 It is a highly successful pragmatic adaptation of an existing, proven platform, making it a robust and widely available solution for forces requiring an extended-range semi-automatic rifle without the higher investment of the SVD.

Therefore, if the priority is maximum inherent accuracy and refinement, the SVD is the superior design. If the priority is widespread issuance, cost-effectiveness, and robust reliability under demanding conditions, the PSL presents a highly effective and practical solution.

VII. Global Adoption and Variants

Both the SVD Dragunov and the Romanian PSL have seen extensive military service globally, particularly within the former Eastern Bloc and among nations that received Soviet or Romanian military aid. Their widespread use underscores their effectiveness in the designated marksman role.

A. SVD Dragunov: Military Users and Variants

The SVD Dragunov, having entered service with the Soviet Army in 1963, quickly became the standard squad support weapon for numerous countries, especially those of the former Warsaw Pact.6 Its robust design and effective performance ensured its continued relevance across decades of conflict.

Current and Former Military Users:

The SVD has been widely adopted by state forces across various regions.28 Notable users include:

  • Russia: Continues to use and upgrade the SVD, with newer SVDM variants being issued.45
  • Former Soviet Republics: Including Kazakhstan 46, Ukraine 45, and Moldova.
  • Eastern Europe: Hungary 46, East Germany (issued as SWD) 6, Czechoslovakia (entered service in the 1970s).6
  • Middle East & North Africa: Iraq 2, Syria 46, Egypt.
  • Asia: China (produced under license as Type 79 and 85) 6, Vietnam.
  • Other: Afghanistan.47

The SVD has been used in numerous conflicts, including the Vietnam War, Soviet-Afghan War, Iran-Iraq War, Iraq War, Syrian Civil War, and the ongoing Russo-Ukrainian War.6 Non-state actors, such as the Islamic State and Lord’s Resistance Army, have also utilized SVDs.6

Figure 3. Nigerien solider calling himself “Romeo” poses for VOA Africa at Camp Assaga, Diffa, Niger. Photo by the Voice of America and obtained via Wikimedia.

Notable Variants:

  • SVD (Original, Russia): The foundational model, characterized by its skeletal stock and long, narrow profile.28
  • SVDS (Russia): A variant featuring a tubular, folding stock, designed for paratroopers.28
  • SVDK (Russia): Resembles the SVDS but is rechambered to fire a larger 9.3x64mm cartridge, intended for targets in heavy body armor or behind cover.28
  • SVU (Russia): A ‘bullpup’ version of the SVD, reconfigured with the magazine behind the trigger assembly to reduce overall length.22
  • Type 79 / NDM-86 (China): Chinese copies of the SVD, visually identical to the original; differentiation often requires checking manufacturer markings.2 The NDM-86 was also produced in 7.62x51mm NATO for export.3
  • Al-Kadesih (Iraq): An Iraqi variant distinguishable by a palm tree embossed on the magazine.28

B. Romanian PSL: Military Users and Variants

The PSL, introduced into Romanian military service in 1974, has also achieved significant global distribution due to its robust design and cost-effectiveness.1

Current and Former Military Users:

The PSL was adopted by all branches of the Romanian Army, internal troops, and police units.1 Its export success led to widespread use in various regions:

  • Romania: Primary user since 1974.1
  • Middle East & North Africa: Iraq (5,000 delivered to Republican Guards in 1978) 1, Iran 17, Libya (including Anti-Gaddafi forces) 1, Syria 17, Egypt.1
  • Africa: Eritrea 1, Ethiopia 1, Angola 17, Republic of Congo, Democratic Republic of Congo, Uganda.17
  • Asia: Afghanistan 1, Bangladesh 1, North Korea 17, Pakistan 17, Vietnam.17
  • Europe: East Germany 1, Republic of Moldova.17
  • Central America: Nicaragua.17 The PSL has been employed in numerous conflicts, including the Angolan Civil War, Iran-Iraq War, Gulf War, War in Afghanistan, Syrian Civil War, and the ongoing conflict in Donbas.17
Figure 4, An Afghan National Army soldier uses a PSL rifle during a demonstration to display weaponry and communicatons capabilities at Camp Joyce, Afghanistan, Feb. 12, 2008. (U.S. Army photo by Spc. Jordan Carter) (Released). (Photo from Wikimedia)

Notable Variants:

  • PSL 54 (Romania): The standard semi-automatic military version, chambered in 7.62x54R.1
  • PSL 51 (Romania): A semi-automatic version chambered in 7.62x51mm NATO, primarily for export.15
  • PL (Romania): A repeating (bolt-action) version chambered in 7.62x51mm NATO.15
  • PSL-54C / Romak III / FPK / FPK Dragunov / SSG-97 (Export): These are sporting versions intended for the export market, particularly the United States. They are largely identical to the military version but feature modifications to comply with import laws, such as the removal of the bayonet lug and receiver modifications (e.g., two trigger mechanism axis pin holes instead of three).1 The “FPK Dragunov” designation is purely commercial and does not imply mechanical commonality with the SVD.1

VIII. Summary Table of Major Features

The following table provides a concise comparison of the key features of the SVD Dragunov and the Romanian PSL, highlighting their similarities and fundamental differences.

FeatureSVD Dragunov (Russia)Romanian PSL (Puşcă Semiautomată cu Lunetă)
TypeDesignated Marksman Rifle (DMR), Sniper RifleDesignated Marksman Rifle (DMR)
Place of OriginSoviet Union (Russia)Romania
In Service1963–present 61974–present 30
DesignerYevgeny Dragunov 21Romania – Cugir 31
Operating MechanismGas-operated, Short-Stroke Gas Piston, Rotating Bolt 3Gas-operated, Long-Stroke Gas Piston, Rotating Bolt 1
Receiver TypeMilled Steel 2Stamped Sheet Steel (RPK-type, reinforced) 1
Caliber7.62x54mmR (original), 9.3x64mm (SVDK variant) 287.62x54mmR (original), 7.62x51mm NATO (export variant) 1
Muzzle Velocity830 m/s 27830 m/s 30
Weight (unloaded, with optical sight)4.3 kg 274.31 kg 30 (4.9 kg with mag & scope, no bayonet 15)
Length (without bayonet)1220 mm 271150 mm 30
Barrel Length620 mm 28620 mm 24
Barrel ProfileOriginally thin, later heavier (SVDM) 6Relatively thin 10
Barrel Rifling Twist240 mm (1:9.4 in) (since 1975) 61:10″ (254 mm) 24 (some sources 320mm 31)
Magazine Capacity10 rounds, detachable box 2710 rounds, detachable box 1
Magazine InterchangeabilityNot interchangeable with PSL magazines 1Not interchangeable with SVD magazines 1
Standard OpticPSO-1 / PSO-1M2 (4x) 22LPS 4×6° TIP2 (4x) 1
Gas SystemAdjustable (two-position) 6Non-adjustable 1
Bolt Hold-OpenYes (last round) 6Yes (military spec), some civilian imports lack it 1
Factory Accuracy (7N1 ammo)~1.04-1.24 MOA (5-shot groups, extreme vertical spread) 22Capable of 1 MOA or less (but with caveats) 1
Effective Firing Range800 m 29800–1,000 m 30
Max Sighting Range (optic)1300 m 271300 m 15
Notable VariantsSVDS, SVDK, SVU, Type 79, Al-Kadesih 28PSL-54C, Romak III, FPK, SSG-97 (export) 1
Countries Used In (Examples)Russia, Ukraine, Iraq, China, Hungary, Syria 6Romania, Iraq, Afghanistan, Bangladesh, Libya, Eritrea 1
Manufacturing CostHigher (milled receiver) 43Lower (stamped receiver) 9

IX. Conclusion

The comparative analysis of the Russian SVD Dragunov and the Romanian PSL reveals two distinct yet functionally similar Designated Marksman Rifles, each a product of unique design philosophies and geopolitical circumstances. The common perception of the PSL as a mere “Romanian Dragunov” is a misnomer, as the rifles are mechanically dissimilar, sharing only their ammunition, optical philosophy, and a general aesthetic.1

The SVD Dragunov stands as a testament to Soviet engineering, purpose-built from the ground up to fulfill a specific doctrinal role: providing squad-level marksmen with rapid, effective fire at extended ranges. Its short-stroke gas piston system and precisely milled receiver reflect a commitment to refinement and inherent accuracy, balancing these qualities with the need for battlefield mobility.3 The evolution of its barrel profile and twist rate further illustrates a pragmatic approach to optimizing performance across various ammunition types and operational conditions.6

In contrast, the Romanian PSL emerged from a different set of imperatives. Driven by political autonomy and a desire to reduce reliance on Soviet military hardware, Romania leveraged its existing Kalashnikov/RPK manufacturing capabilities to create an indigenous DMR.1 The PSL’s long-stroke gas piston system and reinforced stamped receiver, while less refined than the SVD, embody ruggedness, reliability, and cost-effective mass production.1 This approach made the PSL a highly practical and widely distributed solution, demonstrating how economic and political factors can lead to distinct, yet effective, designs for similar military requirements.

In terms of performance, both rifles are effective within their designated roles for engaging man-sized targets out to approximately 800 meters. While the SVD generally offers more consistent out-of-the-box accuracy due to higher quality control and a more stable design, the PSL, with proper ammunition and potential aftermarket modifications, can achieve comparable initial precision.10 However, the PSL’s thin barrel and non-adjustable gas system present limitations for sustained fire and use with heavier ammunition or suppressors, highlighting areas where its adapted design reaches its practical limits.1

Ultimately, the SVD Dragunov represents a dedicated, optimized design for a designated marksman rifle, emphasizing a balance of precision and battlefield utility. The Romanian PSL, while often overshadowed by its Russian counterpart, is a highly successful and reliable adaptation, prioritizing affordability and robust performance through a pragmatic application of existing technology. Both rifles have proven their worth in numerous conflicts worldwide, solidifying their legacy as iconic examples of Eastern Bloc DMRs.

In short, please don’t refer to a PSL as a Dragunov!

Image Sources

Main Image is “SVD and SVDS sniper rifles at Engineering Technologies 2012” Obtained from Wikimedia. Author is Mike1979 Russia. https://commons.wikimedia.org/wiki/File:SVD_and_SVDS_sniper_rifles_at_Engineering_Technologies_2012.jpg

Figure 1 is from Wikimedia and the authors is Hokos. https://commons.wikimedia.org/wiki/File:SVD_Dragunov.jpg

Figure 2 is from Wikimedia and the author is Verein der Freunde und Förderer der Wehrtechnischen Studiensammlung Koblenz e. V. https://commons.wikimedia.org/wiki/File:Dragunow_sniper_rifle_at_Wehrtechnische_Studiensammlung_Koblenz.jpg

Figure 3 is a Nigerien solider calling himself “Romeo” poses for VOA Africa at Camp Assaga, Diffa, Niger. Photo by the Voice of America and obtained via Wikimedia. https://commons.wikimedia.org/wiki/File:Nigerian_sniper.jpg

Figure 4 an Afghan National Army soldier uses a PSL rifle during a demonstration to display weaponry and communicatons capabilities at Camp Joyce, Afghanistan, Feb. 12, 2008. (U.S. Army photo by Spc. Jordan Carter) (Released). Photo from Wikimedia.https://commons.wikimedia.org/wiki/File:Afghan_National_Army_soldier_with_PSL_rifle.jpg

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Amazing tour video of the Hind Mi-24 helicopter by a pilot

Folks, I have found the Russian Hind Mi-24 helicopter absolutely fascinating for decades. Both I and the Hind are old enough to truly say decades in this case as it was delivered to the Soviet Air Force in 1970 but NATO and the West didn’t find out about them until 1972.

The HIND is a huge helicopter gunship and unique in that it has room for eight passengers. At the same time it is fast, armored and loaded with weapons. Soviet pilots called it the “flying tank: and other nicknames include Galina, Crocodile/Krokodil and Drinking Glass.

At any rate, it is very interesting and has evolved over the years plus the Soviets and later the Russians exported it to many countries including Bulgaria, Macedonia and many others plus it has served in a number of conflicts (click here for the Wikipedia Mi-24 page if you want more details).

The purpose of this blog post is to share with you an amazing video assembled by Erik Johnston where Bruce Stringfellow, a Hind pilot, gives a detailed walkround tour of the helicopter. How detailed? It has an hour and 16 minutes of detail – it is the best video I have ever seen if you want to really know more about the design, capabilities and what a preflight check looks like from a pilot’s view. Here it is:

Note, the photo shown at the top is extracted from the video and shared under fair use. I do not own the rights to the video and imagery – the video was created by and presumably owned by Erik Stone Photography. Please visit the actual Youtube video page if you wish to subscribe to Erik Stone’s videos or buy some of his merchandise to support his efforts.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@*********ps.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Video: What is the Best Way to Reload an AK? Kalashnikov Media Answers a Hot Question

You know, it’s interesting how people will argue over stuff on the Internet. Give them a picture of a stick and they will argue about it! Now, turn the topic to AK rifles and debating what is the right or wrong way to do something, things get colorful fast and a lot of energy is wasted over trivial points.

In this video, Vladimir Onokoy, who always does a great job, goes over different reloading approaches. Now most folks do not know Vladimir but I will tell you he is the real deal with considerable Russian military experience and armorer-level experience with the AK platform. In short, I would recommend you listen real close to what he says plus bear in mind that this is a Kalashnikov Media video and they know their stuff as well 🙂

Watch the Video

Normally I give some screen shots and make some color commentary but this video is only 3:05 seconds and seeing is believing.


I fully agree with his conclusion – train and become proficient. They all work the question is what works best for you and only training and experience can answer that.


Please note that all images were extracted from the video and are the property of their respective owner.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@*********ps.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.



PSA AK Webstore Links

Interested in an American made AK? Consider Palmetto State Armory (PSA) as a source. Click on the following links for the associated webstore categories for AK-related rifles, pistols and parts at PSA:

Video: Russian Gunbusters Fires An AK-12 Until It Fails. Wow! Very interesting comments about 5.45 and 5.56 AK barrel Stresses

In this episode, Georgiy Gubich operates a 5.45×39 AK-12 on full auto until it fails. You’ll notice he is wearing body armor and for good reason as you’ll learn from the video.

He starts by loading up a case of 7N6 ammo into 30 mags and then dumping one after another. You get views from several angles and a shot counter plus his observations during the process.

The handguards are starting to smoke and Georgiy mentions he smells burning plastic.
Note the barrel and brake care glowing red at 503 rounds. It’s hard to say for sure, but this puts the temperature at 930-1175F (500-635C) degrees. I don’t know if it is the camera lens distortion but the brake looks like it is drooping. In later photos it does not so I’m thinking the wide angle lens might be causing distortion.
The handguard is on fire by round 510. It’s hard to say for sure but the temperature might be closer to 1490F (810C). She is hot!! Depending on the polymer they are using for the handguards, the ignition flash point could be from 572-1292F (00-700C). I would guess they are using something good because we can see the barrel is well past 1000F and there is an air gap plus the thermal mass of the handguard to consider which is why it took a while to reach the heat of ignition.
Round 630 – Wow! That is an impressive photo. The handguard is on fire and by luck the camera caught one hell of a muzzle flash. I can’t help but wonder what the temperature of the barrel is under the handguards at this point.
The barrel is started to rupture just prior to this point. Sparks could well be burning powder and there is definitely shrapnel flying as well. Yeah, right about now the body armor, gloves and face shield are making a lot of sense!
Georgiy inspects the rifle and sees the burst barrel.
This is where the barrel ruptured and it looks like it took out part of the gas block. Georgiy mentioned this is a common failure areas for 5.56 and 5.45 rifles due to the heat and pressure compare to larger calibers (I assume is he is referring to 7.62×39 and x51 variants). The rust you see is “flash rust” caused by the heat and being cooled down by water.
It definitely took a beating.

Time for the Video!

Summary

The rifle held up three times as long as the Russian Ministry of Defense 180-round burst requirement. Practically, you would expect pauses during firing to allow it to cool down some. I thought his comments about the high-pressure 5.56 x 5.45 rounds causing significant stresses on the barrel was very interesting and hope you enjoyed this video as well.

By the way, a big shout out to Kalashnikov Concern for making these videos available. They are very good!


Please note that all images were extracted from the video and are the property of their respective owner.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@*********ps.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.



PSA AK Webstore Links

Interested in an American made AK? Consider Palmetto State Armory (PSA) as a source. Click on the following links for the associated webstore categories for AK-related rifles, pistols and parts at PSA:

Video: Russian Gunbusters Fires An AK-74M Until It Fails

In this episode, Georgiy Gubich operates a 5.45×39 AK-74M built in 2014 on full auto until it fails. You’ll notice he is wearing body armor and for good reason as you’ll learn from the video.

As with his other videos, you definitely want to watch it to hear his observations during the testing and the post mortem review afterwards.

Georgiy is 210 rounds and gives us a great quote “The smell isn’t great”!!
480 rounds into the test he can hear the plastic hissing as the bolt carrier is starting to stick when he is reloading. The plastic is still holding its shape.
When he went ,to reload after round 570, he had so slam the rifle on the ground to get it to cycle. I’ve heard of this but it’s my first time seeing someone really do it and does it smoothly.
Round 587 – the barrel ruptured just in front of the lower handguard retainer. Note, the Russian Ministry of Defense requires the weapon to handle a 180-round burst so they passed that test more than three times over.
Here’s the rupture. Note the cooked plastic.
Now this fascinates me. They are using a polyamide plastic and it held up remarably well. The solid parts closest to the barrel and gas tube were definitely decomposing but you will notice the horizontal ribbing was able to dissapate the heat fast enough to that point to retain its shape and structural integrity. That pattern makes even more sense to me now after seeing this.

Watch the Video!

Summary

Definitely a cool video and I appreciate Kalashnikov Concern making it possible. Georgiy rocks and really like how he changes mags and cycles the action not to mention his running observations during and after the test.

The biggest take-away for me by far is the understanding of why they ribbed the lower handguards – enabling the ribs to cool enough to maintain structural integrity is fascinating. In theory there will be a upper round-count limit causing more heat than can be dissipated but under practical use, they ought to hold up great.

I hope you found it interesting as well.


Please note that all images were extracted from the video and are the property of their respective owner.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@*********ps.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.



PSA AK Webstore Links

Interested in an American made AK? Consider Palmetto State Armory (PSA) as a source. Click on the following links for the associated webstore categories for AK-related rifles, pistols and parts at PSA:

Video: Russian Gunbusters Fires a 1974 RPK in 7.62×39 Until It Fails – You Totally Need To Watch This!!

Ever wonder how long a heavy duty 1974 Russian RPK in 7.62×39 can fire almost non-stop until failure? Now’s your chance. This video features Georgiy Gubich firing in an episode of the Russian series Gunbusters firing an RPK as fast as he can doing drum and mag dumps on full auto. Yes, he’s wearing armor because he literally shoots it while it starts to burn an ultimately fails.

That is a ton of ammo and a RPK I would much rather own than see them fry it.
Somewhere near 500 rounds being dumped from 75 round mags the handguards are starting to smoke.
About round 997 or 998 the handguard bursts into flame
Even though the handguard were on fire, he shot it until the barrel burst at round 1232.
For me, it’s fascinating that the only thing that truly failed were the handguards and barrel. Everything else could still be used if the barrel was pressed out and replaced.

So you need to watch the video!!

Summary

You might be surprised by the seemingly fast failure of the rifle. Near the end Georgiy takes the RPK apart, notes what happened and points out that the problem for the rifle was the intense heat of the 75 round drums being dumped one after another. Normally you would fire a 2-1/2 30 round magazines and the pause in firing during reloads gives the barrel a chance to cool down plus practical applications aren’t going to see that type of sustained firing. One would assume that if all he had were drums that the RPK would have failed even sooner than round 1,232.

This was really a fascinating video to watch. Part of me really wants to bring that poor abused RPK home and repair it and part of me was interesting to see a video detailing testing to failure with this level of detail. A big thank you to Kalashnikov Group for helping put this video together.


Please note that all images were extracted from the video and are the property of their respective owner.


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PSA AK Webstore Links

Interested in an American made AK? Consider Palmetto State Armory (PSA) as a source. Click on the following links for the associated webstore categories for AK-related rifles, pistols and parts at PSA:

Video: Russian Gunbusters Fires 1,400 Rounds Through A 7.62×39 AK-103 Trying to Get It To Fail

In this episode, Georgiy Gubich operates a 7.62×39 AK-103 built in 2019 on full auto trying to get it to fail. The AK-103 is a remarkable rifle as you will see in the video

He’s smelling hot plastic
Starting here forward he really needs to struggle to get the bolt to exit the chamber. It seems to return and cycle just fine when firing.
He’s seeing flame from the handguards
The lower handguard had already fallen off during a previous reload but look at the barrel glowing red.
The rifle survived through two spam cans, 1,400 rounds, of ammo!
After all that, it could still shoot 2 MOA at 100 meters. Definitely a remarkable rifle.

Watch the Video!

Summary

I’m a fan of both the 7.62×39 round and the AKs that shoot it so I was rooting for the rifle the whole time. It’s pretty amazing that it still ran after 1,400 rounds.

I hope you enjoyed this!


Please note that all images were extracted from the video and are the property of their respective owner.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@*********ps.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.



PSA AK Webstore Links

Interested in an American made AK? Consider Palmetto State Armory (PSA) as a source. Click on the following links for the associated webstore categories for AK-related rifles, pistols and parts at PSA: