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The UZI: A Report on the History, Engineering, and Evolution of an Israeli Icon

The Uzi submachine gun is more than an iconic firearm; it is a physical embodiment of the strategic imperatives that shaped the nascent state of Israel. Born from the logistical chaos of the 1948 Arab-Israeli War, the Uzi was conceived as a definitive solution to a critical national security vulnerability: the lack of a standardized, reliable, and domestically produced personal defense weapon. Its development, spearheaded by Uziel Gal, was a masterclass in pragmatic engineering, synthesizing the most advanced design concepts of its time with the stark manufacturing realities of a new and resource-constrained nation. The Uzi’s innovative telescoping bolt and stamped-steel construction delivered a weapon that was compact, controllable, inexpensive to mass-produce, and exceptionally durable.

While its initial role was to arm the Israel Defense Forces (IDF), the Uzi’s success transcended national borders, becoming one of the most widely proliferated and recognizable submachine guns of the 20th century. Its evolution from the original model to the compact Mini and Micro variants, and ultimately to the modernized Uzi Pro, mirrors the changing doctrines of modern warfare—from conventional state-on-state conflict to the specialized demands of counter-terrorism and the contemporary emphasis on modularity and precision. However, the design was not without its inherent limitations, particularly those associated with its open-bolt operating system and the ballistic constraints of its pistol caliber chambering. Ultimately, the Uzi’s legacy is twofold: it stands as a pivotal achievement in military ordnance that served as a proof-of-concept for Israel’s formidable defense-industrial complex, and as an unexpected cultural icon whose menacing silhouette became deeply ingrained in the global consciousness.

Section 1: Genesis of a Standardized Weapon: The Post-War IDF Arsenal

1.1 The Logistical Nightmare of 1948

The Israel Defense Forces, formally established on May 26, 1948, just days after the state’s declaration of independence, entered the 1948 Arab-Israeli War with a small arms inventory that can only be described as a logistical nightmare.1 The arsenal was a dangerously heterogeneous collection of weapons procured from any and all available sources, reflecting the desperation of the pre-state Jewish paramilitary organizations (Haganah, Irgun, and Lehi) operating under the constraints of a British Mandate and a widespread arms embargo.1

This chaotic inventory included a vast array of rifles from different eras and countries of origin. The primary battle rifles were German Mauser Kar98k variants, largely supplied by Czechoslovakia, and British Lee-Enfield SMLE rifles, often stolen from British armories.4 Alongside these were American M1 Garands and M1 Carbines, and a motley assortment of other bolt-action and semi-automatic rifles.5 The situation with automatic weapons was equally dire. The IDF fielded British Sten guns, some of which were produced locally in clandestine workshops, German MP38/40s, and American Thompson and M3 “Grease Gun” submachine guns.5

This diversity created crippling challenges that threatened the operational effectiveness of the nascent Israeli army. The most pressing issue was ammunition supply. A single infantry unit could be fielding weapons chambering 7.92x57mm Mauser,.303 British, 9x19mm Parabellum, and.45 ACP, all at the same time.3 This complicated logistics to a breaking point, making resupply under combat conditions a perilous gamble. Furthermore, the lack of interchangeability meant that procuring and distributing spare parts was nearly impossible, leading to high rates of attrition for weapons that could not be repaired in the field. Finally, this “arsenal of democracy and its adversaries” made standardized training exceptionally difficult. Soldiers had to be familiarized with multiple weapon systems, each with its own manual of arms, maintenance procedures, and ballistic characteristics, reducing overall combat proficiency.7 The clear and urgent lesson of the 1948 war was that military effectiveness and, indeed, national survival, depended on the standardization of equipment.

1.2 The Strategic Imperative for Self-Sufficiency

The logistical problems of 1948 were a symptom of a much larger strategic vulnerability: a dependency on unreliable foreign arms suppliers. During the war, major powers, including the United States and Great Britain, maintained a strict arms embargo on all belligerents, severely limiting Israel’s ability to acquire modern weaponry through official channels.1 While clandestine shipments, most notably from Czechoslovakia, proved vital, Israeli leadership under David Ben-Gurion recognized that such arrangements were subject to the shifting winds of international politics and could not be relied upon for long-term security.2 The only viable path to a secure future was the development of a robust, indigenous defense industry.

The foundation for this industry had already been laid during the British Mandate. The Yishuv (the pre-state Jewish community in Palestine) had established a network of secret, underground factories to produce small arms and munitions, hiding their activities from British authorities.6 These workshops manufactured grenades, mortars, millions of rounds of ammunition, and copies of the simple British Sten gun, using surplus American machinery acquired as scrap after World War II.6

After the war, these clandestine operations were centralized and formalized under a new state-owned conglomerate: Israel Military Industries (IMI).6 IMI was tasked with a clear mission: to design and produce standardized, reliable, and effective weapons for the IDF, freeing the nation from the precariousness of foreign supply. The development of a new, domestically produced submachine gun was one of its first and most critical projects.8 This project was not merely about creating a new gun; it was a fundamental test of Israel’s new doctrine of military self-reliance. Its success would validate this strategic pivot, providing the technical expertise, industrial capacity, and national confidence needed to undertake more ambitious projects in the future, from the Galil assault rifle to the Merkava main battle tank and beyond.3 The Uzi was, in effect, the first major proof-of-concept for the entire Israeli defense-industrial complex.

Section 2: The Architect and His Influences: Uziel Gal and the Czech Connection

2.1 Profile of the Designer

The man who would answer the IDF’s call for a new submachine gun was Uziel Gal. Born Gotthard Glas in 1923 in Weimar, Germany, his early life was shaped by the turbulent rise of Nazism.11 To escape persecution, his family fled, first to the United Kingdom in 1933 and then, in 1936, to Kibbutz Yagur in British Mandate Palestine, where he adopted the Hebrew name Uziel Gal.7

From a young age, Gal displayed a remarkable aptitude for mechanics and firearms design. As a teenager, he demonstrated this innate talent by inventing and building a bow capable of firing arrows automatically—a “submachine bow,” in essence.7 This passion for weapons development found a natural home in the Palmach, the elite fighting force of the Haganah underground.14 However, his activities did not go unnoticed by the British authorities. In 1943, he was arrested for illegal possession of a firearm and sentenced to six years in prison.7 In a turn of fate, this punishment became a crucial educational opportunity. While incarcerated, Gal formally studied mechanical engineering, gaining the theoretical knowledge to complement his practical skills.13

He was released in 1946, having served less than half his sentence, and immediately resumed his work developing weapons for the Jewish forces preparing for the inevitable conflict.12 After serving as an officer in the 1948 war, Lieutenant Gal was in a unique position to understand the shortcomings of the IDF’s disparate arsenal. In 1949, he submitted a proposal in a competition for a new, domestically designed submachine gun, leveraging his intimate knowledge of both battlefield requirements and mechanical engineering.7

2.2 The Czechoslovakian Influence

Uziel Gal’s brilliance lay not in a singular moment of pure invention, but in his ability to recognize, synthesize, and pragmatically improve upon the most advanced engineering concepts of his time. The primary influence for the Uzi’s revolutionary layout came from Czechoslovakia, a nation that had become a key, albeit politically motivated, arms supplier to Israel during the 1948 war.2 This relationship gave Israeli designers, including Gal, a firsthand look at some of the most innovative post-war small arms designs.

Gal was particularly inspired by the Czech ZK 476 prototype and the subsequent production models, the Sa 23 and its variants.7 These Czech submachine guns were among the first in the world to successfully implement two groundbreaking features: a telescoping bolt and a magazine housed inside the pistol grip.13 This was a radical departure from the conventional submachine gun layout of the era, exemplified by weapons like the German MP40 and the American Thompson, which featured a magazine well located forward of the trigger group. This traditional design necessitated a longer receiver and resulted in a significantly longer and often less balanced weapon.17

Gal recognized the profound tactical advantages of the Czech configuration. By moving the magazine into the pistol grip and allowing the bolt to telescope over the barrel, a far more compact weapon could be created without sacrificing barrel length, which is crucial for maintaining adequate muzzle velocity and effective range. He took this advanced but relatively obscure European concept and systematically “Israelized” it. His contribution was to adapt the core principles to meet the specific, pressing requirements of the IDF. He simplified the design for mass production using stamped sheet metal, a necessity for Israel’s nascent industry; he engineered it for exceptional reliability in the harsh desert environment; and he integrated a multi-tiered safety system tailored to the needs of a largely conscript army. The Uzi is therefore a masterclass in adapting advanced theory to solve real-world problems, a testament to Gal’s genius for pragmatic and robust engineering synthesis.

Section 3: Engineering an Icon: A Technical Deep-Dive into the UZI’s Design

3.1 The Telescoping Bolt

The heart of the Uzi’s design, and the feature most responsible for its revolutionary compactness, is its telescoping bolt.16 In a conventional blowback submachine gun, the bolt is a solid block of steel that reciprocates entirely behind the barrel’s breech. In contrast, the Uzi’s bolt is hollowed out at its front end, allowing it to “wrap around” or telescope over the rear portion of the barrel during its cycle of operation.7

This engineering solution has several profound advantages. First and foremost, it dramatically reduces the overall length of the weapon. Because a significant portion of the barrel’s length is recessed within the bolt for most of its travel, the receiver can be made much shorter. A direct comparison to the German MP40, which uses a conventional bolt, is illustrative. The MP40 has a total length of 630 mm with its stock folded, while the Uzi measures just 470 mm—a reduction of 160 mm, or over 6 inches. Remarkably, the Uzi achieves this compactness while having a slightly longer barrel (260 mm vs. 251 mm), preserving the projectile’s muzzle velocity.17

Second, the telescoping design allows for the use of a heavier bolt in a shorter weapon. In a simple blowback action, the mass of the bolt is the primary factor that counteracts the rearward pressure of the fired cartridge, controlling the timing of the action and the cyclic rate of fire. A heavier bolt slows the cycle down. The Uzi’s heavy bolt resulted in a relatively sedate and highly controllable cyclic rate of approximately 600 rounds per minute (rpm). This slow rate of fire makes the weapon more stable in full-automatic fire, allowing for more accurate and effective short bursts, a critical feature for a military submachine gun.22 Gal’s design, inspired by the Czech Sa 23, also offset the barrel towards the bottom of the rectangular bolt, which helped to lower the axis of recoil and further mitigate muzzle rise during automatic fire.17

3.2 Manufacturing for a New Nation

The Uzi was designed not only for combat effectiveness but also for manufacturability under the specific economic and industrial conditions of 1950s Israel. A key decision in this regard was the extensive use of stamped sheet metal for major components, particularly the receiver.16 This method was significantly cheaper, faster, and required less specialized machinery than producing parts from machined forgings, as was common in many older submachine gun designs.8 This philosophy prioritized the rapid, affordable mass production necessary to equip the entire IDF, embodying a “good enough” approach that did not sacrifice core reliability.

The design also incorporated features specifically intended to enhance reliability in the sandy, dusty conditions of the Middle East. The stamped receiver included pressed-in reinforcement slots that also served as channels to collect sand, dirt, and other debris. This allowed the weapon to continue functioning even with a significant amount of internal contamination that might jam a weapon with tighter tolerances.16 The Uzi was built with relatively few moving parts, making it simple to field strip, clean, and maintain, an important consideration for an army of conscripts.20

3.3 Ergonomics and Safety by Design

The Uzi’s design reflects a deep understanding of weapon handling under the stress of combat. The placement of the magazine well inside the pistol grip, a direct benefit of the telescoping bolt, centers the weapon’s mass directly over the firing hand. This creates a weapon with exceptional balance, making it feel more like a large pistol and allowing it to be aimed and fired accurately with one hand if necessary.22

This layout also provides a significant ergonomic advantage during reloading. The principle of “hand finds hand” means that even in complete darkness or when the operator’s attention is focused on a threat, the spare magazine can be intuitively guided into the grip without fumbling.16 This is a marked improvement over conventional designs that require the operator to locate a forward-mounted magazine well.

Recognizing that the Uzi would be issued to a conscript army with varying levels of firearms experience, Uziel Gal incorporated a robust, multi-layered safety system. This system included three distinct mechanisms:

  1. A three-position selector lever on the left side of the grip, allowing the user to choose between “S” (Safe), “R” (Repetition/Semi-Automatic), and “A” (Automatic).16
  2. A prominent grip safety located on the backstrap of the pistol grip. The weapon cannot be fired unless this safety is firmly depressed by the user’s hand, preventing accidental discharge if the weapon is dropped or snagged.16
  3. An internal bolt safety mechanism that functions as a ratchet, catching the bolt if the charging handle is released before it is fully retracted to engage the sear, preventing a slam-fire.16 This redundancy was essential for ensuring the safe handling of the open-bolt weapon by a wide range of soldiers.

3.4 The 9x19mm Chambering: A Deductive Analysis

While primary design documents are not available, a deductive analysis of the strategic and logistical context of the post-1948 IDF strongly indicates that the choice of the 9x19mm Parabellum cartridge was a deliberate and multifaceted decision.

First, it was a matter of logistical simplification. The IDF’s chaotic initial inventory already included a significant number of weapons chambered in 9mm, including the British Sten, German MP40, and various sidearms like the Browning Hi-Power.3 Furthermore, the clandestine Yishuv workshops had already established the capability to manufacture 9mm ammunition locally during the Mandate period.6 Standardizing on the 9mm caliber for the new submachine gun would therefore streamline a dangerously over-complicated supply chain and leverage existing production infrastructure.

Second, 9mm Parabellum was the global standard. By the 1950s, it had become the de facto submachine gun and pistol cartridge for most of the world’s armies.18 Choosing this caliber ensured that ammunition could be procured on the international market if necessary and, more importantly, positioned the Uzi for future export success. A weapon chambered in a ubiquitous caliber is far more attractive to foreign militaries than one requiring a proprietary or obscure ammunition type.

Finally, the cartridge offered the ideal ballistic suitability for the Uzi’s intended role and operating mechanism. The 9mm round provides a well-understood balance of terminal effectiveness in close-quarters combat, relatively low and manageable recoil, and a compact size that allows for high-capacity magazines.18 Crucially, its power level is perfectly suited for a simple, robust, and inexpensive blowback operating system. A more powerful cartridge would have necessitated a more complex and costly locked-breech or delayed-blowback mechanism, contrary to the core design goals of simplicity and economy of manufacture.

Section 4: The UZI Family: A Lineage of Adaptation and Evolution

The original Uzi was not a static design. Over more than half a century, it evolved into a diverse family of weapons, with each new variant reflecting changes in combat doctrine, technological advancements, and market demands. This evolution demonstrates a continuous effort to adapt the core design for new roles, often involving significant engineering trade-offs between size, concealability, and controllability.

  • Standard UZI (1954): The foundational design that entered service with the IDF. It operated from an open bolt with a cyclic rate of approximately 600 rpm. It was issued with either a distinctive downward-folding metal stock for compactness or a fixed wooden stock for improved stability and a better cheek weld.8 This model established the Uzi’s reputation for reliability and effectiveness in close-quarters combat.
  • Mini-Uzi (1980): Developed in the late 1970s and introduced in 1980, the Mini-Uzi was a direct response to the needs of special forces, vehicle crews, and security details who required a more concealable weapon. It was a scaled-down version of the standard model, featuring a shorter barrel (197 mm), a shorter receiver, and a simpler, side-folding metal stock. To achieve this reduction in size, the bolt had to be significantly lightened. In a blowback system, a lighter bolt travels faster, and the Mini-Uzi’s rate of fire consequently skyrocketed to a blistering 950 rpm, with some tests showing it exceeding 1,300 rpm.19 This made the weapon much more difficult to control in full-auto fire, representing a clear trade-off of controllability for compactness.
  • Uzi Pistol (1984): This variant was not created for a military requirement but was instead a product of market regulations. Developed specifically for the lucrative U.S. civilian market, the Uzi Pistol was a semi-automatic only version of the Micro-Uzi without a shoulder stock. Crucially, it was re-engineered to fire from a closed bolt. This change was necessary to comply with U.S. Bureau of Alcohol, Tobacco, and Firearms (ATF) regulations, which determined that semi-automatic open-bolt firearms were “readily convertible” to illegal machine guns.15
  • Micro-Uzi (1986): In an interesting turn of events, the military Micro-Uzi was derived from the civilian Uzi Pistol. IMI took the semi-automatic, closed-bolt pistol design and adapted it back into a select-fire submachine gun, adding a small, side-folding stock.24 As an even more compact version, its bolt was lighter still, resulting in a phenomenal cyclic rate of fire advertised at 1,200 rpm but often testing well over 1,400 rpm.23 This extreme rate of fire made it a highly specialized weapon, suitable for VIP protection details or extreme close-quarters battle where a massive volume of fire in a fraction of a second was prioritized over sustained accuracy.
  • Uzi Pro (2010): The most recent and radical evolution of the platform, the Uzi Pro is a thorough modernization of the Micro-Uzi design. It addresses many of the original’s shortcomings and brings the platform into the 21st century. The lower receiver is made from advanced polymers to reduce weight, and the magazine release was relocated to a more conventional position on the pistol grip.34 The charging handle was moved from the top of the receiver to the left side, which freed up the entire top surface for a full-length MIL-STD-1913 Picatinnym rail, allowing for the easy mounting of modern optics.34 An additional rail was added under the barrel for lights and lasers. Most significantly, the select-fire Uzi Pro SMG fires from a
    closed bolt, a fundamental departure from the original design. This change dramatically improves first-shot accuracy, reflecting the modern doctrinal emphasis on precision over indiscriminate volume of fire.34

The Uzi’s lineage is a clear reflection of modern military history. It began as a simple, robust tool for conventional infantry warfare. It was then adapted for the rise of specialized counter-terrorism and special operations units that valued concealability above all else. Finally, it was transformed into the Uzi Pro, a modular, precision-oriented platform aligned with the doctrines of the modern, optics-equipped soldier.

Table 1: UZI Variant Technical Specifications

VariantYear IntroducedCaliberOperating SystemRate of Fire (rpm)Weight (Unloaded)Length (Extended/Collapsed)Barrel LengthMuzzle VelocityEffective Range
Uzi SMG19549x19mmOpen-Bolt, Blowback~6003.5 kg640 mm / 470 mm260 mm400 m/s~200 m
Mini-Uzi19809x19mmOpen-Bolt, Blowback~9502.65 kg600 mm / 360 mm197 mm375 m/s~100 m
Micro-Uzi19869x19mmOpen-Bolt, Blowback~12502.5 kg486 mm / 282 mm117 mm350 m/s~50 m
Uzi Pistol19849x19mmClosed-Bolt, BlowbackSemi-Auto Only1.66 kg241 mm (N/A)115 mm345 m/s~50 m
Uzi Pro SMG20109x19mmClosed-Bolt, Blowback~10502.32 kg529 mm / 300 mm152 mm380 m/s~100 m
Note: Data compiled from sources.28 Some figures, particularly rate of fire, can vary based on ammunition and specific production runs.

Section 5: A Critical Assessment: Inherent Shortcomings of the UZI Design

Despite its success and iconic status, the original Uzi design and its direct descendants were not without significant engineering and tactical shortcomings, primarily stemming from their open-bolt operating system and the inherent limitations of the pistol cartridge they fired.

5.1 The Open-Bolt Conundrum

The Uzi’s simple, open-bolt blowback mechanism was key to its reliability and low cost, but it also introduced a set of unavoidable disadvantages that were well-understood by firearms engineers.41

  • First-Shot Accuracy: The most significant tactical drawback of an open-bolt system is its negative impact on first-shot accuracy. When the trigger is pulled, it does not release a hammer or striker; it releases the entire heavy bolt assembly, which then slams forward under spring pressure. This large mass moving within the weapon before the round is even chambered and fired introduces significant disturbance to the shooter’s point of aim.42 This “ka-chunk” effect makes the precise placement of the first shot—often the most critical in an engagement—far more difficult than with a closed-bolt weapon like the Heckler & Koch MP5, where the only major mechanical action upon pulling the trigger is the fall of a small hammer.
  • Safety Vulnerabilities: Open-bolt weapons are inherently less safe than their closed-bolt counterparts, particularly concerning drop safety. If an open-bolt weapon is cocked (bolt held to the rear) and dropped on a hard surface, the inertia of the impact can be enough to jolt the bolt off its sear engagement. The bolt will then fly forward, strip a round from the magazine, chamber it, and fire, all without the trigger being pulled.41 While the Uzi’s grip safety was designed to mitigate this, the fundamental vulnerability remains a characteristic of the operating system.
  • Environmental Susceptibility: When an open-bolt weapon is cocked and ready to fire, the ejection port is wide open, exposing the internal action directly to the elements. This creates a large ingress point for sand, dust, mud, and other battlefield debris, which can accumulate in the receiver and cause malfunctions.16 While the Uzi’s design included features to tolerate some debris, this vulnerability was a persistent concern, especially in the desert environments where the IDF primarily operated.

5.2 The Limits of a Pistol Caliber Platform

The second major limitation of the Uzi was not a flaw in its design, but rather an inherent constraint of its chambering. The 9x19mm Parabellum is a pistol cartridge, designed for engagements at close range. While effective in its intended role of clearing trenches, buildings, or for personal defense by vehicle crews, its performance drops off rapidly at extended distances.18

The Uzi’s maximum effective range is generally cited as 200 meters, but this is an optimistic figure achievable only under ideal conditions in semi-automatic fire.22 In practical combat, especially when firing automatically, its effective range was closer to 50-100 meters.31 This became a critical tactical disadvantage as Israel’s adversaries increasingly armed their infantry with intermediate-caliber assault rifles, most notably the Soviet AK-47 and its derivatives. These rifles fired a 7.62x39mm cartridge that was significantly more powerful and could effectively engage targets out to 300-400 meters.22 An Israeli soldier armed with an Uzi was therefore out-ranged and out-gunned by an adversary with a standard-issue assault rifle. This firepower disparity was a primary driver for the IDF’s decision to relegate the Uzi to rear-echelon and specialist roles, adopting more powerful 7.62x51mm battle rifles like the FN FAL and later, 5.56x45mm assault rifles like the Galil and M16, for its frontline infantry units.

5.3 Weight, Construction, and Ergonomics

While innovative, the Uzi’s design choices created a distinct set of physical and handling drawbacks. The weapon is notably heavy for its class; a loaded standard Uzi can weigh nearly 4 kg (9 pounds), comparable to older WWII-era submachine guns like the American M3 “Grease Gun”.18 This substantial weight, a consequence of its all-steel construction and heavy bolt, could lead to operator fatigue and made it difficult to maintain a stable hold, particularly during extended use.50

The reliance on stamped sheet metal for the receiver, while crucial for rapid and inexpensive production, had its own set of issues. Stamped receivers require a precise and repeatable heat-treatment process to ensure durability; improper execution can lead to warping or the development of micro-fractures under the stress of repeated firing.51 While original IMI-produced Uzis were generally robust, some later commercial copies were noted for poor metallurgy and finish.53 Furthermore, the most common point of failure was not the gun itself but its magazines. The sheet metal feed lips of the magazine were vulnerable to damage, and a bent feed lip was a frequent cause of feeding malfunctions.54

Ergonomically, the Uzi was often described as crude or “clunky” compared to more refined designs like the MP5.25 Criticisms focused on the stiff grip safety, an uncomfortable 90-degree grip angle, and a rudimentary folding metal stock that was functional but not comfortable for the shooter.50 A significant tactical drawback was that the long, vertically protruding magazine made the weapon awkward to fire from a prone position.16

Section 6: From the Sinai to Hollywood: The UZI’s Operational History and Legacy

The Uzi’s story extends far beyond its technical specifications. It is a weapon forged in conflict, proven on the battlefield, and unexpectedly elevated to the status of a global cultural symbol. Its historical timeline charts the course of a new nation’s struggle for survival and the evolution of modern warfare.

Table 2: Historical Timeline of the UZI

Date / YearEventSignificance / Note
19481948 Arab-Israeli War; State of Israel and IDF founded.Exposed the critical need for a standardized, domestically produced SMG.1
1949IDF initiates competition for a new submachine gun.Uziel Gal submits his design, competing against other proposals.7
1950Uziel Gal’s prototype is completed.The core design, influenced by Czech models, is finalized for testing.16
1951The Uzi is officially adopted by the IDF.The design is selected over competitors for its simplicity, cost-effectiveness, and reliability.8
1952Uziel Gal patents his design.Formalizes the intellectual property of the weapon’s innovative features.15
1954First production Uzis issued to IDF special forces.The weapon begins its operational service with elite units.8
1956First major combat use during the Suez Crisis.Proved its effectiveness in close-quarters combat, particularly in clearing Egyptian positions in the Sinai.15
1959West Germany adopts the Uzi as the MP2.Marks the beginning of the Uzi’s major international export success.8
1967Six-Day War.The Uzi is used extensively by Israeli forces in various roles.8
1973Yom Kippur War.The Uzi continues to serve as a standard-issue SMG with the IDF.8
1980Mini-Uzi and semi-automatic Uzi Carbine are introduced.The family expands to meet special forces needs and tap into the U.S. civilian market.15
1981U.S. Secret Service agent deploys an Uzi during the assassination attempt on President Ronald Reagan.An iconic photograph captures the moment, cementing the Uzi’s image in the public consciousness.8
1986Micro-Uzi is introduced.An even more compact variant is developed for extreme concealability and VIP protection roles.15
2003The Uzi is officially retired from service with the IDF.After nearly 50 years, the weapon is phased out in favor of more modern assault rifles and carbines like the Tavor.13
2010The IWI Uzi Pro is introduced.A radically modernized version with a closed-bolt action and polymer components is launched to keep the platform relevant in the 21st century.19
Note: Timeline compiled from sources.7

6.1 Combat Record and Global Proliferation

The Uzi’s baptism by fire occurred during the 1956 Suez Crisis. Israeli paratroopers clearing Egyptian positions, particularly in caves and trenches in the Mitla Pass, found the weapon’s compactness and controllable automatic fire to be ideal for such close-quarters engagements.15 It went on to see widespread service in every major Israeli conflict for the next three decades, including the Six-Day War of 1967 and the Yom Kippur War of 1973, arming not just infantry but also vehicle crews, artillerymen, and officers.8

The Uzi’s battlefield reputation, combined with its low cost and reliability, made it a phenomenal export success. From the 1960s through the 1980s, it was arguably the most widely sold submachine gun in the world.16 It was adopted by the militaries and law enforcement agencies of over 90 countries.19 Notable users included West Germany, which adopted it as the MP2 in 1959 to equip its tank crews and other units, the Netherlands, and Belgium, where it was license-produced by FN Herstal.8 In the United States, it gained prominence as the standard submachine gun of the Secret Service from the 1960s until the early 1990s, chosen for its concealability and volume of fire.16

The following table summarizes some of the key export and production arrangements that contributed to the Uzi’s global proliferation.

Table 3: Selected UZI Export and Production History

DateCountryVolumeModel(s)Acquisition Type
1956NetherlandsUnknownStandard Uzi (wood & folding stock)Direct Sale 16
1958BelgiumUnknownStandard UziLicensed Production (FN Herstal) 16
1959West Germany116,000+MP2 (wood stock), MP2A1 (folding stock)Direct Sale 16
1960sUnited StatesUnknownStandard UziDirect Sale (Secret Service) 16
1976RhodesiaUnknownStandard UziLicensed Production 16
1980sSouth AfricaUnknownStandard UziLicensed Production 19
1990sSri Lanka“Few thousand”Mini Uzi, Uzi CarbineDirect Sale 16
1991MyanmarUnknownBA93, BA94Licensed Production 16
CroatiaUnknownERO, Mini EROUnlicensed Copy 16
ChinaUnknownNorinco M320Unlicensed Copy 16

6.2 The UZI as a Cultural Icon

While the Uzi was being gradually phased out of frontline military service by the 1980s in favor of more capable assault rifles, its presence in global popular culture was exploding. Its unique and menacing profile made it a visual shorthand for modern firepower, and it became a staple in Hollywood action films and television shows, wielded by heroes and villains alike.15

This cultural status was cemented on March 30, 1981. In the chaotic moments following the assassination attempt on U.S. President Ronald Reagan, Associated Press photographer Ron Edmonds captured a stunning image of Secret Service Special Agent Robert Wanko pulling a full-sized Uzi from a concealed briefcase to cover the presidential limousine’s escape.8 That single photograph, broadcast around the world, instantly made the Uzi one of the most recognizable firearms on the planet and inextricably linked it with elite security and covert operations.8

This media exposure created a powerful and enduring brand identity that has far outstripped and outlasted the weapon’s military relevance. While its tactical heyday had passed by the time it became a Hollywood star, its visual identity projected an image of Israeli toughness, efficiency, and cutting-edge design. This “soft power” effect created a global perception of Israeli weapons as being innovative and “battle-proven.” This perception arguably created a more receptive international market for subsequent, more advanced Israeli defense exports, from the Galil rifle to the Tavor and sophisticated missile systems like the Iron Dome. It is a clear demonstration that a weapon’s cultural impact can have tangible geopolitical and economic ripple effects long after its military utility has waned.

Conclusion

The Uzi submachine gun stands as a landmark achievement in the history of 20th-century small arms. It was a weapon that perfectly solved the specific, existential problems of its time and place: a simple, inexpensive, and utterly reliable submachine gun for a new nation fighting for its survival with a conscript army and a nascent industrial base. Its design was not a work of radical invention but rather a masterwork of pragmatic adaptation. Uziel Gal brilliantly synthesized the most advanced submachine gun concepts of the post-war era, refining them into a platform optimized for mass production and battlefield durability.

The weapon’s subsequent evolution from the standard model to its more compact and specialized variants is a direct reflection of the changing face of modern warfare, from the conventional battlefields of the Sinai to the close-quarters demands of global counter-terrorism. Its eventual replacement in frontline IDF service was not a sign of failure, but rather a testament to its success in helping secure a nation that could then afford and doctrinally require more advanced, longer-ranged infantry weapons.

Ultimately, the Uzi leaves a dual legacy. As a piece of military engineering, it was a pivotal success that validated Israel’s strategic doctrine of self-reliance and served as a cornerstone for its world-class defense industry. As a cultural object, it acquired a life of its own, its unmistakable silhouette becoming a global symbol of lethality and modern conflict. It remains a rare example of a weapon that is as significant for its engineering solutions as it is for its enduring, and often notorious, place in the public imagination.


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Sources Used

  1. Milestones: The Arab-Israeli War of 1948 – Office of the Historian, accessed September 11, 2025, https://history.state.gov/milestones/1945-1952/arab-israeli-war
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Videos: Three Good Documentaries on The History of the Israeli Uzi – 2024 Edition

2024 edition prologue: I had to revise my list of Uzi videos to reflect one that had been removed from Youtube and two that were added.

As part of my research into the iconic Israeli Uzi, I found these videos that do a very nice job providing background on the political climate driving the need for the Uzi.  For fans of the Uzi, these may give you some appreciation for the forces that shaped it.

The second video is a great one from Ian of Forgotten Weapons:

And one more video:



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The Best Reference Book On Uzis

I recently wrapped up building a semi-auto Israeli Uzi in 9mm.  At the start, I researched about this iconic submachine gun and guys kept mentioning that I should get the book “The Uzi Submachine Gun Examined” by David Gaboury.  I ordered a copy from Amazon and must say I was very impressed. [Click here for Amazon’s page for the book].

Mr. Gaboury does an exceptional job giving the reader the historical context of what was going on in Israel with its fight for independence, the plethora of firearms they were using and then search for a new submachine gun.  Of course, this culminated in the creation and evolution of the Uzi design by Uzi Gal.

From there he covers the evolution of the weapon with the Mini Uzi, the Uzi Carbine, Uzi Pistol/Micro Uzi, Ruger MP9 and the Uzi Pro.  The book was published in 2017 and its coverage is very current.

One thing I did not know was how widespread the adoption of the Uzi was and Mr. Gaboury provides coverage of its use in The Netherlands, Germany, Belgium, South Africa, China and other countries.

He then covers a number of other topics in the book that I’ll skip for the sake of brevity.  For me, the last section of the book was very, very helpful where he provides significant detail on the weapon including:

  • Operation, Disassembly and Specifications
  • Parts Identification
  • Magazines
  • Accessories

Being new to Uzis, his coverage of the firing cycle, fire control group and how it all comes together in the grip frame (what some call the “grip stick”) was worth the price of the book all by itself.  For me, it was really the history and this last section the detailing of the operation and assembly that were hugely worthwhile.  I’d recommend this book to anyone wanting to learn more about the iconic Uzi.

Click here for the order page on Amazon to learn more and/or order the book. It has 68 ratings and is 4.8 starts – it’s very good!

Also, click here for a page that links to all of my Uzi posts for easier naviation.



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Using Super Lube Grease on a McKay Semi-Auto Uzi

In an earlier post, I mentioned that I have switched to using Super Lube Multi-Purpose Grease on my firearms.  One of my test platforms was a semi-auto Uzi I built using a McKay receiver and McKay closed bolt group.

To legally build a semi-auto Uzi, you need to run a closed bolt system vs. the original open bolt.  Now the open bolt design was the picture of simplicity albeit with a pretty big bolt.  The closed bolt system uses a striker, and while a little more complex, it has a lot of moving surfaces that are parkerized.  This means they are relatively rough and need to wear in plus they need serious lubrication during this period.

My experience with my Uzi was that oil alone didn’t cut it.  Once I moved to using a 1″ chip brush and applying a light layer of Super Lube all over the bolt, striker and insides of the receiver and top cover, the reliability sky rocketed.  At this point, it has worn in fairly well and the action cycles very easily.

My recommendation to anyone building a semi-auto Uzi is to use Super Lube Multi-Purpose grease both during break in and for ongoing lubrication of the bolt and striker system.  I use regular oil on the fire control group.

I hope this helps you out.  It made a world of difference with my Uzi.



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How to Adjust an Uzi Top Cover and Fix a Bolt Blocking Latch Problem – Uzi Would Not Fire

I built an Uzi a few months back and had trouble with it firing. A challenge a person has in the firearms industry is finding time to enjoy shooting! At any rate, I took it out the first time and had really light primer strikes with the firing pin – I’m talking you could barely see there was contact. So with the Uzi refusing to go bang, I had to do some digging.

I got into Uzis because of all the movies and TV shows in the 1980s. I decided to finally make one during the Winter of 2017/2018 and chronicled my efforts. The first time to the range resulted in a lot of good natured ribbing from my brother-in-laws as we could not get it to fire. We could hear the striker hitting real hard but no bang. Luckily I had other guns for us to shoot so I put the Uzi back in the bag and took it home where it then sat for a couple of months.

I did some digging and process of elimination and got it down to a few possibilities that in some cases I had already addressed. The following is my journey and what I did to sort matters out.

Lubrication

The Uzi closed bolt system is a huge chunk of metal and moving parts. When brand new, these parts still have their porous surface finishes on them, rough spots from machining and what not. You need to make sure everything is lubricated. Remember the old saying of it slides, use grease. If it rotates, use oil. I used Tetra gun grease on all sliding parts. I definitely wanted the big bolt body to slide easily. I also did put a light coat of Mobil 1 Full Synthetic 10W30 on the firing pin but really nothing rotates in there. In the trigger group, I used the oil also on all pivot points.

For me, I heard the need for this when I assembled the carbine for the first time. There was a very dry slow-moving sound and grating feel when I first ran the action during assembly. After lubrication it made a world of difference. I could feel and hear the striker hitting far harder. The important point is to lube your weapon. This definitely helped but it did not solve my problem in this case but I could tell it would definitely impact the operation of an Uzi.

Note: When I wrote this I was using Tetra Grease but I am now using Super Lube and it works fantastic on my Uzi. Click here for the write up.

Top Cover Bent

To be honest, I thought for sure this was going to be my problem after a fellow at McKay suggested I check it. I always thought the cover seated hard and I could not release the latch without a tool. As soon as the fellow suggested it I put one and one together – I bet it warped when the third party welded on the Picatinny rail section.

So, I did some digging on the web to figure out what to do. It turns out that you should be able to insert a 0.005″ feeler gauge between the bolt and the cover at the ejection port. Guess what? It wouldn’t go in – the first rib was tight and the far rib was impassable.

Before I go further – one quick comment on feeler gauges. Not all are equal. I have a few in my toolbox but the one I use the most is is this ABN unit shown above. It is accurate enough and it has a ton of gauges.   I point this out because not all of these gauge sets are complete. For example, several of my gauge sets jump as the manufacturer just included the blades needed for their equipment. I’d recommend getting a set with a lot of SAE and metric blades so you have flexibility. For the Uzi dust cover, you need the 0.005 and 0.015 gauges.

Next was to take some plywood stock I had lying around and make a jig. Basically you want two pieces of wood (any wood to avoid marring) that are the same height. The top cover will be suspended between them so you can adjust the cover either up or down.

I then made two little punches. One is made by gluing and brad nailing two pieces of 1/2″ plywood together so I could hit both ribs of the top cover at once. I also made a punch out of a single piece of plywood to adjust just one rib. I then got out one BFH (big frickin’ hammer) to whack with.

If there’s one thing I have learned – don’t go crazy hitting stuff. I put the jig right on the floor for good support and then the dust cover on it. Note that on the front part, I pushed the wood block back until it was supporting a thicker part and not just the thin neck.

So, I gave it a tap – not a very hard one with the thick piece on both ribs and took it over to test. It sure went on the receiver easier. Wow – it overshot the mark. I could now very easily insert the 0.015″ feeler gauge too. My understanding is that you don’t want it that loose or you risk the bolt jumping the sear and resulting in an uncontrolled mag dump. No joke – I don’t need that in my life ever.

I took the cover off the Uzi and flipped it with top now facing up and I tapped down even lighter. It really is surprising how easy the dust cover bends. I thought given the thickness of the sheet metal and the two ribs it would be much stronger but no.

I then took it back and installed it on the Uzi. It was starting to fit better. I definitely noticed that the ribs were different in terms of their gap so I switched to the smaller 1/2″ plywood punch and focused on one rib at a time. Tap and test, tap and test. If I went too far one way, I would flip the cover and tap it the other way.

After about 15 minutes I had it dialed in. The 0.005″ gauge would slide in and the 0.015 gauge met just a bit of resistance.

In working the action you could both feel and see the improvement. As always, there was a nice firm thud of the striker. Problem solved? No – it wasn’t. Argh. It was a definite improvement in operation but did not solve the problem.

The Uzi Bolt Blocking Latch

The web is a wonderful thing. I continued to surf around and read more about peoples’ experiences with Uzis not firing. Finally I read one that caught my eye – the striker has a particular orientation that must be followed to clear the bolt blocking latch. Wow. I knew I didn’t know about that when I installed it because the light strikes definitely indicated the striker wasn’t reaching the primer and this would explain a lot.

Okay, #31 in the above diagram is the bolt blocking latch and #30 is the spring. The bolt blocking latch’s purpose is to reduce (not eliminate) the chance of an out of battery firing. It does this by blocking the striker’s base. In normal operation, it is depressed and the notch in the base clears the latch as it travels forward to touch off the primer. Now there are three key things here and I’ll tell you what I messed up.

  1. The spring must be installed correctly.
  2. The latch must move freely
  3. The striker must be rotated such that the notch is in the right place- you can install it 180 degrees opposite.

So, your’s truly bombed the last one. I did not realize there was an orientation issue. The model B striker’s base is a half circle. The notch must be at the bottom to clear the latch. In this next photo, you can see I have it installed backward:

The following photo shows the installed Uzi bolt blocking latch. See how the bottom part sticks out? That is what will need to clear the notch when it is depressed during normal operation.

Note, I was working on a full size Uzi with a McKay semi-auto receiver and bolt group. Your bolt group may look a bit different.

When installed correctly, the striker sits in its seat and the seat sits in the striker guide like so:

You can see in the above photo how my latch was chewing on the improperly installed striker. As a visual reference for the correct orientation, see how the striker’s base is facing the part of the guide that has a depression in it. When installed, it will look like this:

You can see an immediate difference because when you depress the latch, the striker can fully travel forward and sticks out of the bolt face ever so slightly. That’s what we want!

Verdict – problem solved and fun was had at the range yesterday. The Uzi is still wearing in and smoothing out. We put about 100 rounds of 124 grain S&B FMJ through it.

The carbine was accurate and a lot of fun. If you didn’t read my other posts, there is a rifle length 16″ barrel hidden under the fake can. The weight of the carbine made it really soft to shoot so the girls and I had a lot of fun.

I am going to find a bit bigger optic for it – probably the Vortex Crossfire like I am running on my POF-5.

Regardless, I hope this helps you out!



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What do the Hebrew Characters on the IDF Uzi Grip Frame Mean?

When the Israeli Defense Force (IDF) adopted the Uzi, they had the selector markings written in Hebrew script.  For those of us that can’t read Hebrew, I did some digging as to the translation:

As you can see labelled in the above photo, we have each position marked with the Hebrew term in its romanized form as well as the English translation.

  • Left position:  Otomatit is fully automatic
  • Center position:  Bodedet is single fire / semi-automatic
  • Right position:  Natzur is safe

I hope this helps you out!



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Uzi Part 7 of 7: The Bolt and Final Assembly of the Semi-Auto Uzi Carbine

So the semi-auto 9mm Uzi carbine build has the Molyresin applied and is ready to go together.  The following is an overview of the final assembly steps:

1]  Install the grip frame assembly.  Insert the tip first and swing the back up into position.  Install the grip frame takedown pin.  If the assembly will not go into position you may need to remove the bolt safety.  The McKay receiver and bolt do not use that part.  If you have questions about the grip assembly and preparing it for semi-auto use, click here.

2] Install the stock bracket with its 1/4″ screw and then the stock itself with its three screws taking care to use the correct bit on the slotted screws.  Make sure the bolt doesn’t stick in too far.  If you have questions about converting the quick detach stock to be permanently attached, click here.

3] The handguards are installed with the two screws.  I did my initial build with the beat up originals but then purchased a new set from US Barrel Shroud that isn’t shown in these photos.

4] I installed the barrel nut catch and spring plus the front sight.  Slide the catch far enough back that it hooks the receiver and does not come back out.

5] I then installed the rear top cover catch and rear sight.  The trick here is to push down on the flip sight while pushing the screw through so the threads can engage on the other side.  The little tiny but just locks it in place – the receiver itself is threaded also. Note, I did have an issue with either the thread on the bolt or the receiver.  I could not get the rear sight screw to enter on the opposite threaded side.  After playing with it for a few minutes it dawned on me that either the screw or the threading in the “ear” of the receiver could be messed up so I installed the screw from the opposite direction just to chase the threads real quick and that solved whatever the problem was because when I then tried to insert it the correct way, the screw went right in.

6] Rather than mess with rivets, I tapped the front sling for a #10-28 screw.  I sanded down the head of the screw to avoid interference with the bolt and then applied medium Loctite to the thread when i installed it.  If you need to remove more of the screw head later it can be readily reached with a Dremel and a flap sander or whatever bit you wish.

7]  The 16″ semi-auto barrel slide right into the front trunnion and into the ring of the semi-auto feed ramp.  Rather than use the barrel nut, I opted for a very cool two piece barrel shroud from Title II Arms.  It is solid aluminum and exceptionally well made.  Note, I show a light on a rail adapter on the bayonet lug.  It looks cool but I actually removed it as my hand’s natural hold runs right into it.  It’s not a reflection of the CAA rail but it’s just not for me.  With it gone, my hand can go right out to the end of the handguard and is much more comfortable.

8]  Next it was time to sort out the striker fired bolt system.  This raises a critical legal point –the weapon must fire from a closed bolt.  This means you can’t use the original open bolt.  After some digging, I decided to use the McKay closed semi-auto bolt system for my build.  Now McKay components are popular and they were out of stock on the complete bolt assembly but Robert RTG had it in stock so I bought it and other parts from them.  As of my writing this, for example, McKay has their receivers in stock, bolt assembly but not the barrel so you can check between both firms plus McKay says they sell to Sarco and Apex.

9]  I had to do some reading to figure out how the bolt went together as I had never seen anything quite like it before.  The best write-up I could find that really helped me is right here.  In a nut shell, take your original bolt, push out the extractor retaining pin and then push the extractor straight out the front of the bolt.  From the rear, the extractor looks like a screw due to the slotted head but it is not.  The slot is there to make it easy for you to rotate the extractor into position.  Insert the extractor into the new semi-auto bolt.  You will notice that with your semi-auto bolt a small blocking latch and pin are included just like you would see in the Uzi Pro Pistol – indeed, the whole bolt assembly is very similar to the Uzi Pro Pistol if you look it up.  The little spring and the latch are inserted into the bolt and held in place by the extractor pin in the semi-auto bolt.

Ok – this next photo shows a problem that I didn’t find out until the first trip to the range.  At the lower right of bolt is a pin that holds the extractor in place plus you can see a tab sticking down – that is the locking latch.  Now look at the striker.  You can’t see clearly but it is a half moon shape and I have it installed backward.  The notch, or part of the striker’s base that is missing should be what goes against the bolt blocking latch.  If you get it backward the weapon will not fire and you’ll notice the striker base getting beaten up by the latch.

Here’s the blocking latch – see how the bottom part stocks out?  That is what will need to clear the notch when it is depressed during normal operation.

Here’s what it should look like – note how the striker bar has a smooth side and one with a relieved/depressed surface?  The notched striker base goes towards the smooth portion:

Here you can see the base that is towards the relieved/depressed area plus you can see the blocking latch will let the striker come forward only if the latch is depressed.  The chewed up area on the striker is from my mistaken assembly and a ton of testing trying to figure out what I did wrong.

Here’s another angle.  The striker can only travel forward if that blocking latch is depressed – in the photo, the latch would be pushed down out of the way.  In the Uzi with the bolt oriented the normal way, we would say the latch is being pressed upward.

Last pic:

10]  If you look at the above photo, the striker system.  The lower L-shaped bracket is the “Striker Guide”.  Thestriker spring base and the striker are held in place by a roll pin.  The return spring slides over the striker spring base as shown above.

11]  Take the guide rod and spring from the kit and snip the fiber square board off the end.  I used diagonal cutters and when I made my first cut the little board fell right off.

12]  You then insert the recoil spring into the bolt and rotate the firing pin base while inserting the assembly into the bolt.  The white is Tetra Firearm Grease.  If it slides, grease it.  If it rotates, oil it.  You want this system to be well lubed to help it wear in.

13]  Here is the whole bolt assembly with the recoil buffer at the end.  Now this assebly is slid into the Uzi buffer end first.  It takes some maneuvering to the recoil block into the rear and then the bolt nestles down.

14] The top cover is then installed.  I used a 120 grit flap sander bit to slightly bevel my top cover to the catch can close and the top is really tight.  The top black cover has the bevel in the photo below – it doesn’t take much.  If you have any questions about what needs to be done to prepare the top cover for semi-auto use, click here.

14.1 – Added 7/2/18:  I found out that you really need to fit the top cover.  If you take a feeler gauge, you should be able to insert a 0.005 gauge between the bolt body and the top cover at the ejection port and meet little to no resistance.  However, if you insert a 0.015 gauge, you should feel some resistance – not a complete stop but firm resistance.  At 0.005, the gap is too small and you risk the bolt body binding and not travelling fast enough or far enough resulting in ejection and feed problems.  The cover is very easy to adjust.  I did a more detailed blog about testing and adjusting the cover – click here.

15] Now function test it to be safe.  Do this with the weapon unloaded!!

  • Try to move the selector switch to Full Auto, which is all the way forward.  It must not be able to move past semi-auto.  If it does slide to the forward full auto position, you must fix it.  If you haven’t done so, you need to install or fix your blocking tab that should be welded in the grip frame – click here for details.  If you welded in a blocking plate, it may be too thin or too short.  Regardless, you must figure out what is going on and fix it immediately.  The ATF says the selector must not move into the full auto position.
  • Move the selector to semi-auto (the middle position), hold the grip safety, cock the weapon and squeeze trigger – you should here it dry fire with a real solid clunk sound. Life is good.  If there is a soft click, the striker system did not cock – check your sear to make sure it is protruding into the receiver.
  • Move the selector to semi-auto (the middle position), DO NOT hold the grip safety, cock the weapon and squeeze trigger – the weapon should not fire.  The Uzi should only be able to fire if on semi-auto and the grip safety is held.  Check your pins and that the grip safety bar is sliding properly.
  • Move the selector to safe (all the way to the rear), hold the grip safety, cock the weapon and squeeze the trigger – the trigger should be blocked and nothing should happen.  Turn the safety off and the weapon should fire.  If it does not, check the pins and the selector bar can move into position properly and block the trigger.
  • Last, move the selector to semi-auto, hold the grip safety, squeeze the trigger (do not release it) and cock the weapon while holding the trigger in.  We want to ensure the disconnector grabs the striker assembly.  Now, release the trigger and squeeze it like normal.  You should here it dry fire with a loud clunk sound and that is what you want.  A light click is just the trigger and disconnector moving around and means the striker went back into battery vs. being retained.  Something is off with the geometry – something is bent, you forgot to secure the grip frame with the takedown pin, etc.

If your Uzi passes the function tests, then proceed to test firing.  I’d recommend securing the carbine in a stand and test firing with a string vs. holding the weapon.  Also, only load one round in the magazine at a time and inspecting the carbine, especially the barrel, to make sure the first round fires and the case is ejected.  Look for dings or tears in the case.  Make sure the bullet didn’t get stuck in the barrel.  If things are looking good, put two rounds in the magazine and test the overall cycling of the weapon.  Again, check the case for any big gouges, scrapes, etc.  When you are satisfied that the weapon is functioning correctly, then and only then try more and more rounds of ammo.  I would go from one, to two, to three to five and to 10 before I tried a full clip.  You do not want to have an uncontrolled full auto dump happen so carefully test the Uzi.

I had a lot of fun building mine.  I added a Vortex Venom red dot that I really like so far plus an original Uzi green sling.  Here are some photos and as mentioned the light and rail are off the weapon at this point.

I hope this helps and if you have any suggestions, please let me know.

7/2/2018 Update – I did get rid of the light/laser on the front.  It was in the way of my hand.  I also have some recommendations to double check in case your Uzi has any problems firing – click here.

 



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Uzi Part 6 of 7: Applying the Molyresin Finish

I’ve used John Norrell’s Molyresin finish for years and like it.  It’s easy to apply and quite durable.  My preferred approach is to abrasive blast a steel surface, parkerize it and then apply the Molyresin and bake it on.  There was one challenge this time though – it was below freezing and a snow storm was going on so I opted to just blast and apply the finish.  This ought to hold up fairly well.  With AKs, I am always fighting the selector lever scraping the receiver but don’t have that situation with an Uzi.

1]  Clean everything with brake cleaner or acetone.  I use a ton of brake cleaner.  Also, be sure to wear nitrile gloves to avoid getting oil from your hands onto the clean parts.

2] Here’s a time-saving trick – the Uzi’s original parts were parkerized.  Just clean anything with a good parkerized surface thoroughly but do not blast it off.  If the “park” is worn away, proceed with blasting the surface.  The reason is simple – parkerizing creates a surface that the Molyresin can really adhere to when baked on – even more so than blasting alone.  Molyresin will not last if you just spray it on a smooth surface and bake it so don’t even consider doing that.  In short, at least blast the part including all edges, corners, flat places, and so forth unless they are parked already.  If you have the capacity to park parts [click here for a tutorial], do that and then apply the finish.

3] I used to use the Harbor Freight air brushes but have had a ton of problems with them failing so this year I invested in a nice Paasche H-series airbrush after hearing good things about them over the years.  The quality is night and day better.  I read a bunch of confusing junk on the Web about guys questioning how to hook up their air line.  After buying the kit from Amazon, I simply applied quality PTFE tape to a male 1/4″ plug with a male 1/4″ NPT end and screwed to Paasche air line on to it.  Done.

Paasche supplies a small bracket for holding the airbrush.  I screwed it onto some scrap plywood so I can move it around as needed:

Also, I am really obsessive about clean air – I run a high-end filter system in my shop and still put a screw in filter just before the air brush’s air line just to play it safe.  If you run your air brush off your home compressor, you definitely need to do this.

Another tip – don’t use cheap Teflon/pipe thread tape.  I’ve had excellent luck with the following:

4] John has really good instructions online for applying Molyresin.   I bought a quart of semi-gloss black for the Uzi build plus I plan on using it for a few other projects I have planned thus I bought the big bottle.  They say an 8 oz bottle has enough Molyresin to coat 2.5 AR rifles.  I used a tad over one ounce on the Uzi but I’m inefficient with my application because I am spraying all the little parts also.   You have a ton of adjustments you can do when applying a finish via a paint brush so your actual coverage will vary.  I have a simple theory though – I’d rather have left over finish than be in the middle of something and run out!

5] You need to preheat your parts to 150F.  This allows the solvent to evaporate very quickly.  Since the Uzi parts are all relatively small, I used my portable roaster oven that I bought at WalMart on sale.  Oven thermostats are notoriously inaccurate so use a good thermometer to confirm the actual temperature.  I use a Fluke 62 Max Plus due to my work with plastics and steel.  My oven runs about 47 degrees cooler than what the dial heat setting claims for example.  At any rate, I start preheating my parts while I get m airbrush ready.  All the cleaning and surface prep is done at this point and I am wearing either nitrile gloves.

6] So, I used the size 1 tip that was installed in the Paasche brush and set the air pressure to 20 pounds and then dialed the tip in and out until I got the spray pattern that I wanted.  One of the nice things about the Paasche is that the company stands behind their products – you can ask questions, lots of people have written about them and you can also download the manuals.  I can tell you one thing, I am never going back t the Harbor Freight brushes now.

7]  Shake the heck out of the Molyresin to get the settled pigment into suspension.  Don’t just shake it once or twice – make sure the cap is on and shake vigorously for 20-30 seconds.  Molyresin has pigments that are carried along with the solvent that must be deposited onto the metal and then baked into place.  The liquid solvent is really just a carrier.

8] I apply the Molyresin in several coats until I have a uniform color everywhere.  One trick I learned years ago is to take a cardboard box and cut slots in it to push in screws to paint their heads.  Be sure to periodically shake your airbrush to keep the pigments in suspension.

9] For the barrel, I do install rubber plugs in the ends of the barrel to prevent finish from going inside.  You can buy these tapered silicone rubber plugs from a variety of sources and reuse them.  My current batch is from Amazon.

10] When you are done, clean the airbrush with MEK.  One thing I do is to clean the little supply bottle first, fill the bottle with MEK and then blow in through the brush to clean the internals.  Note, use MEK in a well ventilated area as you do not want to breath those fumes.

11] Place the parts in the oven at 300F for one hour to actually set the phenolic resin.  This temperature is critical as nothing will happen if you heat to a lower temperature and you may affect the sheen of the finish if you go hotter.  Again, use a good thermometer to make sure you are at or just over 300F – allow for the accuracy of your thermometer in other words.  If your thermometer’s rated accuracy is +/- 1% then shoot for 303-305F for example or even a tad hotter but not less.  The one hour is also a minimum.  Boosting the temperature and reduce the time is not recommended.

That’s it – the parts are ready to be assembled.

To reinforce one important point — I follow the Molyresin application instructions to the letter and get very good results and that is why I have used it for years and have no plans on changing.

This is my Fluke – the -20 to +1202F range model:

Unless you will be working with metals and need the higher temp, you can save money by going with:

Since stuff gets beat up in my shop, I always put instruments in cases and use this one:



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