The Kalashnikov assault rifle, in all its iterations from the original AK-47 to the modern AK-12, is a global icon of military hardware. While its reputation is built on unparalleled reliability, simplicity, and mass-producibility, a critical and often overlooked aspect of its design is the protective finish applied to its surfaces. The evolution of these finishes is not a story of aesthetics but a direct and pragmatic chronicle of the Soviet and later Russian industrial and military philosophies. Each change in coating technology was a calculated response to evolving manufacturing methods, advancements in material science, and the unyielding doctrinal demand for a weapon that could be produced in the millions and function flawlessly in the harshest environments on Earth.¹ The finish is not merely a cosmetic layer; it is an integral and functional component of the weapon system.

This report will detail the chronological progression of these protective coatings. It begins with the hot salt bluing of the early milled-receiver AK-47s, a process suited to the post-war industrial base. It then examines the revolutionary shift to a phosphate-and-paint system, an essential enabling technology for the cost-effective stamped-receiver AKM. The analysis continues through the refinement of this system into the highly resilient “phosphate varnish” of the AK-74 era, and culminates in the modern, incrementally improved coatings of the Russian Federation’s AK-100 series and the current-issue AK-12. By examining the technical specifications, application processes, and the strategic rationale behind each change, a clear picture emerges of a design philosophy where function dictates form, down to the microscopic layers protecting the steel.

Table 1: Summary of AK Platform Finish Evolution

Model/Variant	Production Years (Soviet/Russian)	Receiver Type	Primary Metal Finish	Furniture Material & Finish
AK-47 (Types 1-3)	1949–1959	Stamped (Type 1), Milled (Types 2, 3)	Hot Salt Bluing (Oxidation)	Solid Birch Wood w/ Reddish-Brown Shellac
AKM	1959–c. 1977	Stamped Steel	Phosphate Base + Black Enamel Paint	Laminated Plywood w/ Nitrocellulose Lacquer, Bakelite Pistol Grip
AK-74	1974–c. 1991	Stamped Steel	Phosphate Base + BF-4 Lacquer (“Phosphate Varnish”)	Glass-Filled Polyamide (Plum, later Black)
AK-100 Series	c. 1994–Present	Stamped Steel	Refined “Phosphate Varnish” (Black)	Black Glass-Filled Polyamide
AK-12	2018–Present	Stamped Steel	Modern Phosphate-Based Coating System	Black Glass-Filled Polyamide

Section 1: The Foundation of Durability – Finishes of the Milled-Receiver AK-47 (1949-1959)

1.1 Post-War Industrial Imperatives and Material Choices

The design of the original AK-47 was forged in the industrial reality of the post-World War II Soviet Union. The primary requirements were for a simple, robust rifle that could be manufactured quickly and cheaply using mass-production methods.¹ While the initial Type 1 prototypes (1948-1949) featured a stamped sheet metal receiver, the manufacturing technology of the time struggled to produce them with sufficient rigidity and consistency.² Consequently, from 1951, production shifted to the Type 2 and subsequent Type 3 models, which utilized a receiver machined from a solid forging of steel.¹ This process was slower and more wasteful of raw material, but it leveraged the USSR’s existing capabilities in machining and produced an exceptionally strong and rigid receiver that was inherently more resistant to corrosion and damage than thin sheet metal.⁴

1.2 The Primary Finish: Hot Salt Bluing (Оксидирование)

The standard finish for the major external steel components of the milled-receiver AK-47, such as the receiver and dust cover, was hot salt bluing. In Russian technical literature, this process is referred to as оксидирование (oksidirovaniye), or oxidation.⁵ It is a chemical conversion process that creates a protective layer of black iron oxide, specifically magnetite (Fe3​O4​), on the surface of the steel.

The application process, consistent with Soviet-era industrial practices for firearms, involved several key steps. First, parts underwent mechanical polishing followed by rigorous degreasing in a hot alkaline solution, typically heated to 60-70°C, to ensure a chemically pure surface necessary for a uniform finish.⁵ Next, the clean parts were submerged in a boiling aqueous bath of strong oxidizing agents and alkalis, such as sodium hydroxide and sodium nitrate. This caustic solution rapidly formed the desired black oxide layer. This method was chosen over slower, more labor-intensive techniques like “rust bluing” because its speed and simplicity were perfectly suited to the demands of mass military production.⁷ After a set time in the bath, parts were removed, rinsed thoroughly in boiling water to eliminate any residual corrosive salts, and finally immersed in oil. The oil displaced any remaining moisture and sealed the microscopic pores of the oxide layer, deepening the black color and significantly enhancing its corrosion resistance.⁸

1.3 Internal Protection: The Critical Role of Chrome Lining

Beginning with the Type 2 AK-47 in 1951, a critical, non-cosmetic feature was introduced: the barrel bore and chamber were hard-chrome plated.¹ Later models extended this protection to the gas piston head. This decision was driven purely by the need for functional reliability. Soviet military ammunition of the era used corrosive primers, which left behind potassium chlorate salt residues that would aggressively attack and pit unprotected steel, especially in humid conditions. The hard chrome layer provided an exceptionally durable, corrosion-proof, and low-friction surface. This not only prevented rust and pitting from corrosive ammunition but also reduced wear from the passage of bullets and eased the extraction of spent casings, directly contributing to the Kalashnikov’s legendary ability to function despite fouling and neglect.⁴

1.4 Wood Furniture: The Iconic Reddish-Brown Shellac

The stock, pistol grip, and handguards of the early milled-receiver AK-47s were typically made of solid birch wood.¹⁰ To protect the wood from moisture, handling wear, and the harsh conditions of military service, a simple and inexpensive reddish-brown shellac was applied. This finish gave the early AKs their distinctive, often glossy, appearance. The significant variation in color and hue observed in surviving historical examples can be attributed to inconsistencies in shellac batches, differences in application thickness between production runs, and the natural wear and aging of the finish over decades of service.¹⁰

The finishing strategy for the milled AK-47 was thus a pragmatic, multi-layered system tailored to the specific vulnerabilities of each component. It was not a monolithic “blued” finish. The external steel parts, being thick and robust, received a rapid and cost-effective hot salt blue that was deemed “good enough” for external protection. In contrast, the internal components subjected to the most extreme conditions of heat, pressure, and corrosive ammunition residue received a far superior and more expensive treatment—hard chrome plating. This demonstrates a core principle of Soviet design: allocate advanced processes and resources only where they are functionally indispensable for reliability and service life. The result was a rifle that was economical to produce in vast quantities yet possessed targeted, high-technology protection in its most critical areas.

Section 2: The Stamped-Receiver Revolution – The AKM and the Phosphate-Paint System (1959-1970s)

2.1 A New Manufacturing Philosophy

The introduction of the AKM (Avtomat Kalashnikova Modernizirovannyi) in 1959 marked a fundamental paradigm shift in Kalashnikov production. It successfully returned to the stamped sheet steel receiver concept (designated Type 4) that had been attempted with the Type 1 AK-47.¹ The driving factors were overwhelmingly economic and strategic: stamping a receiver from a 1 mm-thick sheet of steel and riveting it to milled front and rear trunnions was vastly cheaper, faster, and less wasteful of material than machining a solid 4-pound block of steel.³ This manufacturing revolution enabled a massive increase in production volume, allowing the Soviet Union to equip its own vast military and liberally supply its Warsaw Pact allies and client states around the world.

2.2 The Two-Layer System: A Necessary Evolution

This shift in manufacturing necessitated a corresponding evolution in the rifle’s protective finish. A thin, 1 mm stamped steel receiver is far more susceptible to rust, dents, and damage than a thick, milled one. The simple hot bluing finish used on the AK-47 was no longer sufficient to provide the required level of durability and corrosion resistance. The solution was the adoption of a more robust, two-part coating system: a phosphate base coat with a protective paint topcoat.³

The heart of this new system’s protective capability was the phosphate base coat, a process known in Russian as фосфатирование (fosfatirovaniye). During this process, steel parts were immersed in a hot, acidic solution containing manganese or zinc phosphate salts.⁵ This triggered a chemical reaction that etched the surface of the steel and deposited a thin, uniform, microcrystalline layer of insoluble metal phosphates. This phosphate layer, chemically bonded to the steel, served two critical functions. First, it acted as an excellent corrosion inhibitor on its own. Second, its slightly porous, crystalline structure provided an ideal anchor for paint to adhere to, mechanically locking the topcoat to the metal and preventing the chipping and flaking that would occur if paint were applied to a smooth, unprepared surface.¹³ The resulting phosphate layer had a characteristic matte gray to dark gray appearance.¹⁴ Over this base, a non-reflective, matte-black enamel paint was applied, providing the final color, an additional physical barrier against abrasion and moisture, and a low-visibility finish suitable for the battlefield.³

2.3 Technical Deep Dive: The Phosphating Process (Based on GOST Standards)

Soviet industrial processes were rigorously controlled by a set of state standards known as GOST. While the specific internal technical manuals for the Izhmash or Tula arms factories are not publicly available, the GOST standards for metal finishing from the era provide authoritative technical data on how these processes were conducted. GOST 9.305-84, “Metallic and non-metallic inorganic coatings. Operations of technological processes for obtaining coatings,” details the specific chemical compositions and operating parameters for military-grade phosphating.¹⁶ These specifications reveal a sophisticated and tightly controlled chemical process.

Table 2: Technical Specifications for Soviet Military Phosphating (per GOST 9.305-84, Table 70)

Composition No.	Solution Composition (g/dm³)	Temperature (°C)	Duration (min)	Process Controls (Acidity)	Notes/Application
1	Zinc phosphate monobasic: 10-15; Ammonium phosphate monobasic: 10-15; Sodium nitrite: 1.0-1.5	95–98	3–10	–	For all parts, including thin-walled and spring-type parts.
2	Zinc nitrate hexahydrate: 42-58; Orthophosphoric acid: 9.5-15.0	85–95	10–25	Total: 60-80; Free: 12-16; Ratio: 4.5-6.5	May be used before cold deformation.
3 (“Mazhef”)	“Mazhef” preparation: 30-35; Zinc nitrate hexahydrate: 50-65; Sodium fluoride: 2-5	45–65	8–15	Total: 40-60; Free: 2.5-6.0; Ratio: 16-10	Accelerated process. Sodium fluoride may be excluded for parts with zinc/cadmium coatings.
5	Zinc phosphate monobasic: 10-15; Ammonium phosphate monobasic: 10-15; Sodium nitrite: 1.0-1.5	75–80	3–10	–	For all parts except thin-walled and spring-type.

2.4 Furniture in Transition: Laminated Wood and Bakelite

The AKM also saw significant changes in its furniture. The solid wood stock and handguards were replaced with components made from birch plywood laminate.⁴ This material was stronger, far more resistant to warping from moisture and temperature changes, and cheaper to mass-produce than solid wood stocks. The finish applied to this laminated wood was a VK-1 nitrocellulose lacquer, which was more utilitarian and less glossy than the shellac used on the AK-47.³ A major innovation was the introduction of the pistol grip made from AG-4S Bakelite, a thermosetting phenol formaldehyde resin. Its distinctive reddish-orange or brownish color became an iconic and instantly recognizable feature of the AKM platform.¹⁰

The development of the AKM’s finish demonstrates that the coating was not an independent upgrade but an essential enabling technology. The primary goal was to make the rifle cheaper and faster to produce via a stamped receiver. However, this new receiver was inherently more vulnerable to corrosion. Therefore, a more complex and protective finish—the phosphate and paint system—had to be developed and implemented in parallel. The finish was a direct and necessary consequence of the manufacturing revolution, critical to ensuring the new, lighter rifle met the same stringent standards of durability as its milled predecessor.

Section 3: Refinement and the Rise of Polymers – The AK-74 and Late-Soviet Era (1974-1991)

3.1 The “Phosphate Varnish” System (Фосфатный Лак)

With the introduction of the 5.45x39mm AK-74 in 1974, the two-part coating system pioneered on the AKM had become mature and standardized. Russian technical sources refer to this refined system as “фосфатный лак” or “phosphate varnish”.¹⁷ It is crucial to understand that this is not a single product but the system of a phosphate base coat sealed with a specialized, high-performance lacquer topcoat.¹⁸ Information from a Ural defense enterprise indicates that this type of coating became the standard for all Russian-made small arms starting in 1954, though its widespread implementation on the Kalashnikov platform began in earnest with the AKM and was perfected on the AK-74.¹⁷

3.2 The Definitive Topcoat: BF-4 Lacquer (Лак БФ-4)

A key finding from Russian-language technical sources is the identification of the specific topcoat used in this system as BF-4 lacquer.¹⁸ This was applied over the phosphated steel surface. Analysis of the relevant state standard, GOST 12172, reveals that BF-4 is not a “paint” in the conventional sense but is technically classified as a phenol-polyvinyl acetal adhesive (клей фенолополивинилацетальный).¹⁹ The choice of an industrial adhesive as a firearm coating was a deliberate and sophisticated engineering decision based on its unique properties, which were ideally suited to the stresses a military rifle endures.

The properties defined by GOST 12172 explain its selection:

• High Elasticity and Vibration Resistance: The adhesive was specifically designed for bonding materials subjected to significant vibration loads.²¹ This is critical for a finish on a stamped receiver, which flexes during firing and is subject to constant shock and impact. A brittle paint would quickly crack and flake off under these conditions.
• Wide Operating Temperature Range: BF-4 is rated for continuous operation in temperatures ranging from -60°C to +60°C, a range that perfectly matches the extreme climates, from arctic cold to desert heat, in which the Soviet military was expected to fight.²¹
• Superior Adhesion and Sealing: As an adhesive, it forms an exceptionally tough, chemically bonded barrier. It impregnates the porous phosphate layer beneath it, effectively sealing the steel from moisture, cleaning solvents, and oils. The application process involved phosphating the parts, applying a thin layer of the BF-4 lacquer, and then heat-curing the finish (sources suggest a thermal resistance of up to 300°C), creating a thin, tough, and exceptionally durable protective system.¹⁸

Table 3: Key Properties of BF-4 Lacquer/Adhesive (per GOST 12172)

Property	Specification	Rationale for Firearm Application
Chemical Base	Phenol-polyvinyl acetal adhesive 19	Provides superior bonding and sealing compared to standard paint.
Operating Temperature	-60°C to +60°C 21	Ensures finish integrity in all potential combat environments.
Key Feature	High elasticity for vibration loads 21	Prevents cracking and flaking on a flexing, high-impact stamped receiver.
GOST Standard	GOST 12172 19	Indicates a standardized, quality-controlled industrial product.

3.3 The Polymer Age: The End of Wood

The AK-74 program marked the definitive transition away from organic materials for rifle furniture. While early AK-74s retained the laminated wood stock of the AKM, they soon adopted furniture made from modern polymers.⁹ The now-famous “plum” colored stocks, handguards, pistol grips, and even magazines were made from a durable, glass-filled polyamide. This material was impervious to moisture, highly resistant to impact, and stable across a wide temperature range. In the late 1980s, coinciding with the development of the modernized AK-74M, the color of this polymer furniture was standardized to a non-reflective matte or semi-gloss black, which has remained the signature of Russian Kalashnikovs ever since.

The adoption of BF-4 lacquer represents the peak of Soviet-era chemical engineering applied to small arms finishing. It was a significant technological leap from a simple paint barrier to a scientifically chosen industrial coating system designed for maximum resilience. This “phosphate varnish” system was not a minor paint change; it was a fundamental upgrade in the coating itself, reflecting a deep understanding of materials science and an unwavering commitment to maximizing the service life and battlefield durability of the weapon.

Section 4: The Modern Era – Finishes of the Russian Federation (1991-Present)

4.1 The AK-100 Series: A Standardized Platform

Developed in the 1990s after the dissolution of the Soviet Union, the AK-100 series (including the AK-101 through AK-105) represents an effort to modernize and standardize the platform for a new era.² These rifles are essentially variants of the AK-74M, offered in different calibers (5.56x45mm, 7.62x39mm, and 5.45x39mm) and barrel lengths, and are uniformly clad in the black polymer furniture standardized on that model. The metal finish on the AK-100 series is the fully mature and refined black “phosphate varnish” system—a phosphate base coat sealed with a durable lacquer topcoat. This finish represents the culmination and standardization of the late-Soviet era coating technology, providing a robust, reliable, and cost-effective solution.

4.2 The AK-12 and Beyond: Incremental Improvements and New Frontiers

The current-issue assault rifle of the Russian military, the AK-12 (GRAU index 6P70), continues to build upon this proven foundation.²⁴ The core protective system remains unchanged in principle: major steel components are protected by a phosphate-based coating, and critical internal parts like the barrel bore, chamber, and gas piston remain hard-chrome lined for maximum corrosion resistance and durability.²⁶ This latter feature has been a constant in Kalashnikov design for over 70 years, a testament to its unmatched effectiveness against corrosive ammunition and wear.

The topcoat on the AK-12 is likely a modern evolution of the BF-4 lacquer concept, a specialized polymer or ceramic-reinforced coating optimized for modern, automated application techniques and offering incremental improvements in wear resistance and adhesion. It is important to note and discard irrelevant information found during research; commercial products like “Kompozit AK-12,” an acrylic paint for swimming pools, have no relation to the military firearm’s finish.²⁷

Looking to the future, the Kalashnikov Concern is actively exploring next-generation technologies. Reports from the development phase of the AK-12 mentioned the testing of an experimental self-lubricating nano-composite coating.²⁹ While this technology was not adopted for the final mass-produced version, its investigation indicates a clear interest in advanced coatings that could reduce or eliminate the need for liquid lubricants. Such a finish would further enhance the rifle’s legendary reliability, particularly in environments with high levels of sand and dust where traditional wet lubricants can attract grit and cause malfunctions.

The modern Russian approach to small arms finishing demonstrates a philosophy of “if it isn’t broken, don’t fix it—but do improve it.” The core phosphate-and-chrome system remains because it is a proven, economical, and exceptionally effective solution that is well-understood by the Russian industrial base. There is no compelling performance or cost reason to abandon it for standard-issue rifles. Innovation is therefore focused on refining the topcoat chemistry for better durability and exploring next-generation technologies like nano-coatings for future weapon systems, rather than radically altering the proven foundation. This dual-track approach—conservative adherence to a proven system for mass production coupled with advanced R&D—is the hallmark of a mature and pragmatic military-industrial complex.

Conclusion: A Legacy of Pragmatic Protection

The evolution of the finishes applied to the Kalashnikov family of rifles is a clear and logical progression driven by tangible engineering and economic requirements. The journey began with the simple, rapid hot salt bluing of the early milled-receiver AK-47, a process sufficient for the robust construction of the time. The shift to a thinner, stamped-steel receiver for the AKM was a manufacturing revolution that necessitated a corresponding revolution in protection, giving rise to the robust two-part phosphate-and-paint system. This system was further refined during the AK-74 era with the adoption of a highly resilient “phosphate varnish” system, which used a specialized industrial adhesive, BF-4 lacquer, as a topcoat to create a finish of exceptional durability. This culminated in the modern, incrementally improved phosphate-based coatings used on the AK-12 and AK-100 series today.

Throughout this 70-year history, the finish was never an aesthetic choice. It was a critical, functional component in the relentless pursuit of a weapon that was cheap to build, easy to maintain, and would not fail the soldier, regardless of the conditions. The history of the AK’s finish is a microcosm of the Soviet and Russian design philosophy: a pragmatic, function-over-form approach where every layer of protection was added for a specific, calculated reason. This is the enduring legacy of the Kalashnikov’s protective coatings.

---

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, we are only paid if there is an affiliate program such as Avantlink, Impact, Amazon and eBay and only if you purchase something. If you’d like to directly donate to help fund our continued report, please visit our donations page.

---

Sources Used

1. AK-47 – Wikipedia, accessed August 1, 2025, https://en.wikipedia.org/wiki/AK-47
2. History Of The AK-47 – Wideners Shooting, Hunting & Gun Blog, accessed August 1, 2025, https://www.wideners.com/blog/history-of-the-ak-47/
3. Evolution Of The AKM | An Official Journal Of The NRA, accessed August 1, 2025, https://www.americanrifleman.org/content/evolution-of-the-akm/
4. How AK-47 Guns Work – Kalashnikov Weaponry Timeline, accessed August 1, 2025, https://www.popularmechanics.com/military/weapons/a6301/anatomy-of-an-ak-47/
5. ВОРОНЕНИЕ, ФОСФАТИРОВАНИЕ, ПАССИВИРОВАНИЕ И … – VK, accessed August 1, 2025, https://m.vk.com/wall-84539901_105168
6. Воронение, окраска металлов – Airgun.Org.Ru •, accessed August 1, 2025, https://airgun.org.ru/forum/viewtopic.php?t=1391
7. How It’s Made: The AK-47 (Over 100 Million Produced!) – YouTube, accessed August 1, 2025, https://www.youtube.com/watch?v=eEU_ZqQDkd4
8. НАСТОЯЩЕЕ ВОРОНЕНИЕ – KALASHNIKOV.ru, accessed August 1, 2025, https://kalashnikov.ru/medialibrary/13c/true-bluing.pdf
9. AK-74 – Wikipedia, accessed August 1, 2025, https://en.wikipedia.org/wiki/AK-74
10. AK-47 – Research Corner – ARC Discussion Forums, accessed August 1, 2025, http://www.arcforums.com/forums/air/index.php?/topic/243278-ak-47/
11. AK-47 | Definition, History, Operation, & Facts – Britannica, accessed August 1, 2025, https://www.britannica.com/technology/AK-47
12. History of the AK-47 | The Iconic Firearm’s Evolution – Colorado Gun Sales, accessed August 1, 2025, https://cogunsales.com/history-of-ak-47/
13. AK-47 Finish: Impact on Durability and Longevity Explained – GunCreed, accessed August 1, 2025, https://guncreed.com/2024/08/30/how-does-the-finish-of-an-ak47-affect-its-durability/
14. Фосфатирование металла перед покраской – Lacover, accessed August 1, 2025, https://lacover.ua/ru/fosfatirovanie-metalla-pered-pokraskoj/
15. Параметры для оценки качества фосфатного покрытия (на стали) – НПП Электрохимия, accessed August 1, 2025, https://zctc.ru/sections/Kriterii%20kachestva%20fosfatirovaniya
16. ГОСТ 9.305-84 Единая система защиты от коррозии и старения …, accessed August 1, 2025, https://ckc-piter.ru/gost/9305-84/
17. Оригинальное покрытие (фосфатный лак) | НПО «АЕГ …, accessed August 1, 2025, http://npoaeg.ru/news/original-news/
18. Чем красят АК 74 – Оружейные технологии и оптика, accessed August 1, 2025, https://www.chipmaker.ru/topic/145676/
19. КЛЕЙ БФ-4 гост 12172-74 от 01.01.1976 г. в г. Москва – Все краски, accessed August 1, 2025, https://www.vse-kraski.ru/gost/klei/103-kleiy_bf-4_gost_12172-74.html
20. Клей БФ-4 – – Химпром, accessed August 1, 2025, https://www.hpyar.ru/good/kley-bf-4
21. Клей БФ-4 фасовка 3л (2 кг), 20л (15 кг), купить в России, цена от 445, accessed August 1, 2025, https://him-stroy.ru/products/kley-bf-4/
22. КЛЕЙ БФ-4 ГОСТ 12172-74(100мл). Для склеивания цветных металлов, нерж. сталей, кожи, неметаллов с металлами. Выдерживает вибрационные нагрузки., accessed August 1, 2025, https://flus.com.ua/kleya-i-laki/kleia/klej-bf-4-100ml
23. Ручной пулемет Калашникова – РПК 74 – GunRF, accessed August 1, 2025, https://gunrf.ru/rg_pulemet_rpk74_ru.html
24. AK-12 – Wikipedia, accessed August 1, 2025, https://en.wikipedia.org/wiki/AK-12
25. AK-12 – Kalashnikov Group, accessed August 1, 2025, https://en.kalashnikovgroup.ru/catalog/boevoe-strelkovoe-oruzhie/avtomaty/avtomat-kalashnikova-ak-12
26. Автомат АК-12 – характеристика, отзывы, стрельба – Guns.Club, accessed August 1, 2025, https://guns.club/lib/oruzhie/avtomat-ak-12/
27. Краска для бассейнов Kompozit АК-12, 0,9 кг, голубой, матовый – OxiDom (ОксиДом), accessed August 1, 2025, https://oxidom.com/ru/farba-dlia-baseiniv-kompozit-ak-12-09-kh-blakytnyi-matovyi/
28. Pool paint AK-12 – Krasa.lv, accessed August 1, 2025, https://krasa.lv/en/product/baseina-krasa-ak-12/
29. The AK-12 Assault Rifle (Battle Rifle) | PDF – Scribd, accessed August 1, 2025, https://www.scribd.com/document/137558398/The-AK-12-Assault-Rifle-Battle-Rifle