Bazooka
The Bazooka is a man-portable, shoulder-fired recoilless rocket launcher developed by the United States as the principal infantry anti-tank weapon during World War II.[1] It consists of an open-ended smoothbore steel tube, originally 54 inches (137 cm) long and weighing 12.75 pounds (5.8 kg) when empty, designed to launch 2.36-inch (60 mm) rockets equipped with shaped-charge warheads capable of penetrating armored vehicles.[2] The weapon's effective range extended up to 200 yards (183 m), with a rate of fire of about five rounds per minute, allowing individual soldiers to engage tanks, pillboxes, and other fortifications at close range.[2] The Bazooka's development traced back to early 20th-century rocket experiments by physicist Robert H. Goddard, who designed a tube-fired rocket during World War I, but the practical shoulder-launched version was created in 1942 by U.S. Army lieutenants Edward Uhl and Leslie Skinner at Aberdeen Proving Ground, building on Goddard's solid-fuel concepts.[3] The name "Bazooka" was coined by testing troops, inspired by the resemblance of the launcher's long tube to the novelty musical instrument—a trombone-like kazoo made from a stovepipe and funnel—popularized by comedian Bob Burns in the 1930s and 1940s.[3] Initially designated the 2.36-inch Rocket Launcher M1, it entered service that same year and saw its combat debut during the Allied landings in North Africa, where it quickly proved its value against Axis armor despite early challenges like backblast hazards and inconsistent rocket performance.[4] Throughout World War II, the Bazooka transformed infantry anti-tank tactics by enabling portable firepower against increasingly armored threats, with over 500,000 units produced and widespread use in campaigns from Normandy to the Pacific theater.[5] Its success prompted adversaries like Germany to develop copies, such as the Panzerschreck, highlighting its battlefield impact.[6] Post-war variants, including the improved M9 and M20 "Super Bazooka," extended its service into the Korean War and beyond, influencing modern shoulder-launched munitions like the RPG series, though it was eventually superseded by more advanced systems in the late 20th century.[5]Introduction
Overview and role in warfare
The Bazooka is a man-portable, recoilless rocket launcher designed primarily for anti-tank warfare, firing 2.36-inch (60 mm) rockets equipped with shaped-charge warheads to penetrate armored vehicles.[7][8] It enabled infantry units to engage enemy tanks and other armored targets at short effective ranges of up to 150-200 meters, providing a critical capability for foot soldiers previously reliant on heavier artillery or anti-tank guns.[8][9] In tactical terms, the Bazooka's portability—typically operated by a two-man team with one loader and one gunner—allowed for rapid deployment in defensive positions or ambushes, making it suitable for non-specialized troops without extensive training.[3][7] Its simplicity in operation and relatively low weight enhanced infantry mobility on the battlefield.[8] The weapon demonstrated general combat effectiveness against light to medium tanks, with shaped-charge warheads capable of penetrating up to 3-5 inches (75-127 mm) of armor depending on the rocket model and engagement range, though performance diminished against heavier frontal armor.[8][9] By the 1970s, however, the Bazooka became obsolete due to advancements in tank armor that exceeded its penetration limits, leading to its replacement by disposable launchers such as the M72 LAW for greater convenience and improved lethality.[10][8]Etymology
The term "bazooka" originated as the name of a novelty musical instrument invented by American comedian Bob Burns in the early 1930s, constructed from two pieces of plumbing pipe and a whiskey funnel to produce a trombone-like sound, which Burns popularized in his radio and film performances.[11] This instrument gained widespread recognition through Burns' comedy routines, where he often referred to it humorously as his "bazooka."[3] The weapon acquired its nickname during testing in 1942, when U.S. Army Ordnance personnel at Aberdeen Proving Ground in Maryland observed the resemblance between an early prototype of the rocket launcher and Burns' elongated, tubular instrument.[12] Officially designated the 2.36-inch Rocket Launcher M1 (and later variants in the M1 series), the device was never formally named "bazooka" by the military, but the informal moniker stuck among soldiers due to the visual similarity.[13] Following World War II, "bazooka" became the predominant common name for the weapon in military and popular contexts, evolving further into generic slang for any shoulder-fired rocket launcher in American English and broader culture.[14]Design and operation
Physical construction
The Bazooka, officially designated as the 2.36-inch Rocket Launcher M1 and its variant M1A1, features a simple yet robust physical design centered on a tubular steel launch tube measuring approximately 54 inches in length with a smooth bore. This thin-walled steel construction provides the necessary heat resistance to endure the intense exhaust from rocket propulsion while maintaining a lightweight profile for infantry portability, weighing about 13.26 pounds unloaded.[15][16] The launch tube integrates with a wooden shoulder stock and pistol grip, enabling stable shoulder-fired operation in standing, kneeling, or prone positions. The stock incorporates compartments for the electrical ignition system, including two active dry cell batteries (Eveready 791-A or BA-42 type) and space for two spares, connected via insulated wiring and contact springs to the trigger switch for safe, battery-powered ignition. A sling attachment allows for convenient transport by the two-man crew, consisting of a gunner and loader.[15][13][17] Aiming is facilitated by fixed iron sights mounted on the left side of the tube: a peep-type rear sight and a front sight with three vertical studs calibrated for ranges of 100, 200, and 300 yards. Safety elements include a conical wire mesh flash deflector screen at the muzzle to mitigate forward blast hazards and a metal face guard positioned above the stock to protect the gunner's face from debris or flash. The open breech design leverages the recoilless principle for recoil mitigation through rearward gas venting, with the tail latch assembly securing the tube's stability.[15][16][18] Subsequent models, such as the M9 series, featured a longer tube for improved flight stability, increasing the unloaded weight to approximately 6.9 kg (15.2 lb), while an experimental M18 variant introduced aluminum alloys to achieve a reduced unloaded weight of 4.7 kg (10.3 lb).[13][19]Firing mechanism
The Bazooka employs a recoilless firing mechanism, relying on the rearward expulsion of propellant gases through an open nozzle at the breech to counter the forward momentum of the rocket, thereby avoiding any mechanical recoil absorption system. This design allows the weapon to be lightweight and shoulder-fired without significant kickback to the operator.[20][21] The ignition system is electrical in nature. Early models such as the M1A1 utilize two dry cell "B" batteries connected to a trigger-activated contact generator, which produces a current to ignite the rocket's electric squib and initiate the motor burn. Subsequent variants, including the M9 and M9A1, incorporate a self-contained magneto within the pistol grip; squeezing the trigger rotates a flywheel to generate the necessary electrical impulse for ignition, eliminating battery dependency.[20][22][21] Operation requires a two-man team for efficiency: the gunner and loader. Loading occurs from the rear of the open tube, with the loader inserting the rocket fin-first until the tail latch secures it, then removing the safety fork or pin and attaching the rocket's contact wire to the launcher's external contact spring. The gunner shoulders the weapon using the integrated wooden or metal stock and grip, aligns the target via simple iron sights—a post front sight and peep rear sight on the M1A1, or an optical ring sight on the M9 for ranges up to 700 yards—and maintains the firing position. The firing sequence demands prompt execution: after loading, the gunner moves the safety to the fire position and steadily squeezes the trigger to launch the rocket, ideally completing the process within seconds to minimize propellant heating in the tube.[20][22][21] Safety considerations are critical during firing. A back-blast danger zone extends approximately 15 to 25 yards (14 to 23 meters) behind the launcher, where hot gases, flame, and debris pose severe hazards to personnel or flammable materials; operators must ensure this area is clear, and prone firers should angle their bodies at 45 degrees to the rear. Additionally, the rocket's piezoelectric or impact fuze arms only after traveling a minimum distance of 5 to 10 meters from the muzzle, preventing accidental detonation in close proximity. Reloading follows the same rear-loading procedure after ejecting any misfire, enabling a sustained fire rate of up to 10 rounds per minute with well-coordinated team work, typically requiring 5 to 10 seconds per cycle.[20][22][21]Rocket ammunition
The standard ammunition for the Bazooka was the 2.36-inch (60 mm) M6 series high-explosive anti-tank (HEAT) rocket, primarily the M6A1 and improved M6A3 variants. These rockets measured 21.6 inches (549 mm) in length, weighed approximately 3.5 pounds (1.6 kg), and featured a fin-stabilized design for flight stability. The M6A1 had a conical ogive nose and six straight fins, while the M6A3 incorporated a hemispherical ogive for enhanced standoff and four curved fins within a drum assembly to reduce dispersion.[23][24] Propulsion was provided by a solid-fuel motor using double-base ballistite propellant, consisting of five sticks (each 0.36 inches in diameter and 4.15 inches long) that ignited upon electrical firing and burned completely within 0.02 to 0.03 seconds, achieving a muzzle velocity of about 265 feet per second (81 m/s). The warhead employed a shaped charge with a pentolite explosive filler (a 50/50 mix of PETN and TNT) and a metallic liner, typically copper or mild steel, which utilized the Munroe effect to collapse upon detonation and form a high-velocity metal jet directed forward. This jet penetrated armor by focusing explosive energy, capable of defeating up to 3 inches (76 mm) of homogeneous steel armor at a 30-degree impact angle across all ranges.[25][24][23] The rocket's base-detonating fuze, a piezoelectric impact type located in the forward plug of the stabilizer tube, included a safety pin removed prior to loading; upon launch, acceleration armed the fuze by withdrawing a contact wire from the tail fin, preventing premature detonation until impact. Flight trajectory was fin-stabilized, with an effective range of approximately 200 meters for accurate anti-tank engagement and a maximum range of up to 600 meters, though dispersion increased beyond 300 meters.[23][24] In addition to the primary HEAT rounds, the Bazooka fired the inert M7 series practice rockets, which mirrored the M6 dimensions but contained no explosive or propellant for training purposes, marked by a blue band on the ogive. Limited variants included the T31 incendiary rocket, based on the M10 smoke round design, for igniting flammable targets, and experimental anti-personnel rounds with fragmentation or white phosphorus payloads, though these saw restricted combat use compared to the standard HEAT ammunition.[23][26]History
Development phase
The development of the Bazooka drew from early 20th-century experiments in rocketry and shaped charges, building on World War I efforts to create infantry-portable anti-armor weapons. During WWI, American physicist Robert H. Goddard conducted pioneering tests with solid-fuel rockets, including a demonstration of a tube-launched solid-fuel rocket using a music stand at Aberdeen Proving Ground on November 10, 1918, just before the Armistice, which laid conceptual groundwork for tube-launched projectiles capable of delivering explosive payloads over short ranges.[27] In the interwar period, shaped charge research advanced significantly; Swiss engineer Henry Mohaupt developed a high-explosive anti-tank grenade in the late 1930s, demonstrating its ability to penetrate armored plates using a metal-lined conical cavity that focused explosive energy into a penetrating jet.[28] Mohaupt's work, patented in 1939 and brought to the United States in October 1940, directly influenced U.S. military adoption, while the U.S. Navy's ongoing studies at the Naval Torpedo Station in Newport, Rhode Island—stemming from Charles E. Munroe's 1888 discovery of the "Munroe effect" for directional explosives—provided foundational understanding of hollow-charge dynamics in the 1930s.[29] In early 1942, as the U.S. entered World War II, Army Ordnance officers Lieutenant Edward Uhl and Captain Leslie Skinner, working at Aberdeen Proving Ground, spearheaded the Bazooka's invention to address the urgent need for an infantryman-carried anti-tank weapon effective against German Panzers.[1] Inspired by the limitations of existing anti-tank rifles and the potential of rocket propulsion, they adapted Goddard's earlier concepts with Mohaupt's shaped charge warhead, creating an initial wooden mockup of a shoulder-fired tube launcher to test rocket stability and firing mechanics.[7] This prototype, essentially a steel tube with electrical ignition wires connected to a battery, was successfully fired in April 1942, proving the feasibility of launching a 60 mm rocket from a lightweight, recoilless device without excessive backblast hazards.[30] Integrating the shaped charge required overcoming key technical challenges, particularly ensuring the warhead's hollow-charge fuze armed reliably at the rocket's low velocity of about 265 feet per second, which was insufficient for traditional impact fuzes designed for higher-speed projectiles.[1] Uhl and Skinner's team, collaborating with engineers from the National Defense Research Committee, modified the M10 grenade's design—based on Mohaupt's principles—into the rocket-propelled M6 round, incorporating a base-detonating fuze that activated after a short arming delay to allow safe launch from the open-ended tube.[31] This adaptation enabled the shaped charge to form a high-velocity metal jet capable of penetrating up to 3 inches of armor at 100 yards, marking a breakthrough in portable anti-tank technology. The M1 Bazooka design was finalized in June 1942, with the first production units completed by General Electric that month, following refinements to the launcher's electrical contacts and shoulder rest for improved handling.[13] Initial field tests revealed problems with fuze reliability in varying temperatures and short effective range limited to about 100 yards due to rocket trajectory drop-off, but these were deemed acceptable given the weapon's simplicity and the pressing demand for anti-tank capability.[32] The first combat use occurred during Operation Torch in North Africa on November 8, 1942, where U.S. forces employed the M1 against Axis armor. Production ramped up rapidly in response to the threat posed by German armored divisions; by the end of 1942, over 5,000 M1 units had been manufactured, with monthly output increasing to meet infantry division allocations of up to 93 launchers per regiment.[30] This swift scaling, driven by wartime urgency, ensured the Bazooka reached frontline troops within months of prototyping, transforming U.S. infantry tactics against mechanized forces.[7]World War II deployment
Following the successful prototyping, the U.S. Army rapidly scaled up production of the M1 Bazooka, with General Electric delivering the initial batch of 5,000 units by June 1942.[8] By the end of World War II in 1945, total production across variants reached approximately 478,000 launchers, making it a standard issue for U.S. infantry squads as a portable anti-tank weapon.[8] Over the same period, more than 15 million rockets were manufactured, including high-explosive anti-tank (HEAT) and smoke variants, to support widespread deployment.[8] To integrate the Bazooka into operations, the U.S. Army issued Field Manual 23-30 in February 1944, which detailed loading procedures, firing techniques, and tactical employment for two-man crews in close-assault scenarios against armored vehicles.[33] The manual emphasized its role in infantry squads, particularly within armored units, where it supplemented heavier anti-tank guns by enabling rapid, man-portable fire from cover.[33] Training programs, including instructional films produced in 1943, focused on crew coordination—one loader and one gunner—to address the weapon's backblast hazards and aiming requirements.[34] The Bazooka's early field trials during Operation Torch in Tunisia in November 1942 yielded limited success, as many units were operated by untrained personnel and suffered from rocket malfunctions caused by environmental factors like humidity and improper storage.[35] Initial design flaws, such as sensitive electrical igniters, compounded these reliability issues in desert conditions. By 1944, improved variants proved pivotal in the Italian campaign, where Fifth Army tests demonstrated effective penetration against Panther tank turret sides and running gear when striking at close range.[36] In Normandy, Bazooka teams exploited vulnerabilities in German armor, such as rear engines and tracks, contributing to infantry successes against heavy tanks like the Panther.[35] Logistical challenges persisted throughout deployment, including intermittent ammunition shortages that strained supply lines in forward areas and required prioritized distribution to frontline units. Crew training demands further complicated rollout, as the weapon's specialized handling necessitated dedicated instruction to minimize accidents and maximize accuracy under combat stress.[34] Under the Lend-Lease program, the U.S. supplied Bazookas to Allied forces, including approximately 3,000 units and 4,260 rockets to the Soviet Union for Eastern Front use, as well as quantities to the Free French, British, and Yugoslav partisans to bolster their anti-tank capabilities.[37][35]Post-WWII evolution
Following World War II, the Bazooka underwent several adaptations based on wartime lessons, particularly from the Pacific Theater where high humidity caused frequent failures in the electrical ignition system due to battery corrosion and moisture ingress. In response, upgrades during late 1943 focused on enhancing waterproofing and reliability; the M1A1 model, fielded in July 1943, incorporated improved electrical contacts, while the M9 series, introduced in October 1943, featured a magneto ignition system and two-piece design to mitigate these issues. These modifications addressed feedback from Pacific operations.[33] The outbreak of the Korean War in 1950 highlighted the limitations of the original 2.36-inch models against Soviet T-34 tanks, yet the Bazooka was retained in U.S. inventories due to its proven portability, low production costs (under $50 per unit), and ease of maintenance compared to heavier alternatives like the 57mm recoilless rifle. This cost-effectiveness—allowing rapid deployment without extensive retraining—motivated the accelerated development of the M20 "Super Bazooka," a 3.5-inch design with larger warheads capable of penetrating up to 11 inches of armor, entering production in August 1950 and seeing first combat use that July. Over 750 units were produced at Rock Island Arsenal within the year, directly addressing Korean theater needs.[38][39] During the Cold War, the Bazooka series transitioned toward obsolescence as anti-tank threats evolved; by the mid-1950s, it was largely phased out in favor of recoilless rifles like the M67, which offered greater versatility without the two-man crew requirement, though the Bazooka's shoulder-fired concept influenced their design. The introduction of the disposable M72 LAW in 1961 fully supplanted it as the standard light anti-armor weapon, with the LAW's one-man operation and 66mm warhead providing superior mobility at half the weight.[40][41] Testing programs in the 1950s at Rock Island Arsenal evaluated Bazooka variants for diverse environments, including tropical conditions to simulate potential Southeast Asian deployments, and explored infrared night sights for low-light operations, though these enhancements saw limited adoption before the shift to recoilless systems.[42] Decommissioning accelerated in the 1960s as surplus units were diverted from active service; through the Military Assistance Program (MAP), Bazookas were granted or sold to allied nations in the Third World until the late 1970s, supporting anti-communist efforts in regions like Latin America and Southeast Asia.[43]Operational use
World War II theaters
The Bazooka entered combat in the North African campaign during the Tunisian phase in late 1942, where it was introduced midway through the fighting as a short-range infantry anti-tank weapon.[44] Initial uses were hampered by insufficient training, resulting in failures during open engagements against German armor.[44] U.S. forces adapted by shifting to ambush tactics, enabling the first confirmed tank kills in Tunisia and marking a doctrinal evolution toward close-range, concealed attacks.[44] In the Italian campaign, the weapon played a pivotal role at the Anzio beachhead in 1944, where Bazooka teams engaged German armor during intense counterattacks, scoring hits including five on a Tiger tank at close quarters, demonstrating its potential against heavy armor despite penetration limitations. The Bazooka's value in defensive positions contributed to coordinated infantry actions that neutralized numerous German vehicles.[45][46] The European Theater saw expanded Bazooka employment during the Battle of the Bulge in December 1944, where it contributed significantly to German tank and self-propelled gun losses through multiple confirmed kills and immobilizations in sectors like Krinkelt-Rocherath.[47] Its effectiveness against Tiger tanks was limited to engagements under 100 meters, targeting vulnerable side or rear aspects to penetrate up to 80 mm of armor.[48] Field reports emphasized its reliability in winter conditions for halting armored advances, though success depended on crew positioning and rapid firing.[49] Across World War II theaters, the Bazooka contributed to German armored vehicle losses as documented in postwar surveys, underscoring its impact on infantry anti-tank doctrine.[50] However, reliability issues persisted, including a dud rate influenced by fuze malfunctions and environmental factors, often exacerbated by moisture affecting rocket propellant.[33] In the Pacific Theater, U.S. Marines utilized the Bazooka extensively at Iwo Jima in February 1945 for bunker-busting operations against fortified Japanese positions.[51] Supporting assaults on coastal draws, teams fired the weapon to suppress and destroy entrenched defenses, aiding advances by the 4th and 5th Marine Divisions.[51] High humidity and temperatures frequently corroded batteries and electrical contacts, causing ignition failures and reducing operational effectiveness in tropical environments.[33]Korean and Vietnam Wars
During the Korean War, the M9 and M20 variants served as the primary shoulder-fired anti-tank weapons for U.S. and Republic of Korea (ROK) forces, with the M20 Super Bazooka proving particularly effective against North Korean T-34/85 tanks after its introduction in mid-1950. At the Pusan Perimeter in August 1950, approximately 900 M20 launchers were deployed along the defensive line, enabling ROK and U.S. infantry to knock out multiple enemy tanks by targeting their sides and rear armor, where penetration reached up to 7 inches (178 mm) of rolled homogeneous steel. The weapon's shaped-charge warhead overcame the limitations of the earlier 2.36-inch M9, which often failed against the T-34's sloped frontal armor due to insufficient velocity and penetration. However, following the Chinese intervention in late 1950, the M20 was increasingly employed in an indirect fire role against massed infantry assaults, functioning as a light artillery piece to disrupt human-wave attacks by the People's Volunteer Army, though its limited ammunition supply and reload time reduced its sustained effectiveness in such scenarios.[38][52][53] Tactical adaptations in Korea included mounting M20 launchers on vehicles like jeeps and half-tracks for mobile fire support, enhancing their utility in open terrain battles such as those around the Chosin Reservoir, where extreme cold tested equipment reliability but the M20's mechanical simplicity allowed consistent performance without widespread freezing issues. U.S. troops praised the M20's dependability in sub-zero temperatures, contrasting with some small arms that jammed, though its back-blast required careful positioning to avoid endangering nearby comrades during defensive stands. Compared to the Soviet RPG-2 used by Chinese and North Korean forces, the M20 offered similar anti-tank penetration but was critiqued for shorter effective range (around 150 meters versus the RPG-2's 200 meters), limiting its utility in fluid engagements.[38][54] In the Vietnam War, the M20 Super Bazooka remained in limited service with U.S. and Army of the Republic of Vietnam (ARVN) units during the early 1960s, primarily for ambushing enemy bunkers and fortifications in jungle environments rather than anti-tank roles, given the scarcity of armored threats. Its 3.5-inch high-explosive anti-tank (HEAT) rounds were effective at breaching reinforced positions, while white phosphorus (WP) variants provided illumination and smoke for night operations or marking targets in dense vegetation. However, the weapon's 15-pound weight and cumbersome 55-inch length hindered mobility in patrols, leading to its phase-out by 1966-1967 in favor of the lighter, disposable M72 LAW, which offered comparable penetration with greater portability. Troops reported issues with the M20's back-blast igniting foliage or injuring operators in confined jungle settings, exacerbating risks during close-quarters ambushes. The M20's armor penetration, at about 7-9 inches, was inferior to the North Vietnamese RPG-7's 11+ inches with PG-7V rounds, making the Soviet system more versatile against occasional U.S. vehicles like the M113. For enhanced mobility, some units sling-loaded M20s under helicopters for rapid deployment to remote firebases, adapting to Vietnam's terrain-dependent warfare.[55][13][56]Conflicts after 1970
Following the end of major U.S. involvement in the Vietnam War, the Bazooka and its variants saw increasingly sporadic and limited deployment in non-U.S. conflicts, primarily through surplus stocks captured or supplied to irregular forces. In the Middle East, while no verified instances of Israeli forces employing captured M20 Super Bazookas against Syrian T-62 tanks during the 1973 Yom Kippur War have been documented, the weapon's obsolescence against advanced armor was evident in the broader regional shift toward more effective anti-tank systems.[57] In Latin America, Argentine forces utilized the M20 Super Bazooka during the 1982 Falklands War, deploying it in anti-ship roles against British naval vessels and for defensive positions on the islands. The weapon, part of the Argentine Army's inventory of aging U.S.-origin equipment, was employed by infantry units to target amphibious landings and support fortifications, though its unguided nature limited precision in maritime engagements. Additionally, Central American guerrillas, particularly leftist insurgents in El Salvador during the 1980s civil war, incorporated captured or smuggled M20 Bazookas into their arsenals for ambushes and assaults on government installations; for instance, in June 1981, Farabundo Martí National Liberation Front (FMLN) fighters used them alongside automatic rifles to overrun a provincial capital, and in March 1982, they damaged telecommunications infrastructure with bazooka fire. These uses highlighted the weapon's persistence in low-intensity conflicts where modern alternatives were scarce.[58][59][60][61] In Africa and Asia, surplus M20s reached proxy forces amid Cold War proxy wars, though their adoption remained rare owing to the widespread availability of the more reliable Soviet RPG-7. U.S.-backed UNITA rebels in Angola received American surplus weaponry during the 1970s and 1980s, including older anti-tank launchers like the Bazooka variants, as part of covert aid funneled through allies such as South Africa and Zaire to counter MPLA forces; however, UNITA prioritized RPG-7s and other Warsaw Pact captures for their superior penetration against Angolan armor. Similarly, Afghan mujahideen were supplied with U.S. surplus arms via Operation Cyclone in the 1980s, encompassing legacy anti-tank systems, but Bazookas saw minimal documented use compared to the RPG-7, which dominated due to its reloadable design and effectiveness in mountainous terrain.[62][63][64][65] The final documented combat applications of the Bazooka occurred among Somali militias during the 1990s civil war, where scavenged or surplus units were employed in urban fighting; notably, during the January 1991 uprising in Mogadishu that ousted President Siad Barre, a guerrilla used an army-stolen Bazooka to destroy a government tank amid the chaos of clan-based warfare. By the early 2000s, global stockpiles of operational M20s and similar variants had largely depleted, with remnants confined to remote insurgent caches or museums. This decline stemmed from the weapon's replacement by guided anti-tank missiles, such as the U.S. TOW and Soviet AT-3 Sagger, which offered greater accuracy and armor penetration post-1960s, alongside no significant upgrades to the Bazooka design after the Vietnam era. The RPG-7's proliferation further marginalized it, providing a cheaper, more versatile alternative in asymmetric conflicts.[66][67][68][69]Variants and models
Original Bazooka (M1/M1A1)
The original Bazooka, officially designated the 2.36-inch Rocket Launcher M1, entered service in 1942 as the U.S. Army's first man-portable anti-tank rocket launcher. It featured a solid wooden stock with an integrated spade grip for shoulder stability and control during firing, along with a simple steel launch tube open at both ends to accommodate the rocket's propulsion. The design prioritized rapid production and ease of use by infantry, drawing from experimental work on recoilless rocket systems conducted earlier in the decade.[70] Early production M1 launchers encountered reliability problems with the electrical ignition system and rocket fuzing, including premature detonations and failures due to moisture ingress or poor contacts, which were progressively resolved through design tweaks during manufacturing. These issues were particularly evident in initial combat trials, where environmental factors exacerbated component vulnerabilities. The M1 measured approximately 54 inches in length and weighed about 13 pounds unloaded, rendering it functional but cumbersome for extended infantry maneuvers.[26][71] In response to these shortcomings and reports of back-blast injuries from improper firing positions, the M1A1 variant was standardized in 1943 with an enhanced electrical system, including repositioned dry-cell batteries in the stock for better accessibility and reduced exposure to elements, alongside improved waterproofing seals on the tube and wiring. This model retained the wooden spade-grip stock but eliminated a forward pistol grip to minimize operator interference with the back-blast cone of hot gases and flame extending rearward. Over 50,000 M1A1 units were produced, emphasizing simplified assembly for wartime output. The series' fixed sights—consisting of a front post with three range studs (for 100, 200, and 300 yards) and a rear peep aperture—lacked fine adjustments, limiting precision beyond basic point-and-shoot tactics.[70][33][13] The M1 saw its combat debut during Operation Torch in North Africa in November 1942, while the M1A1 entered service in mid-1943, seeing use in the Allied invasion of Sicily in July 1943, where teams employed them against Axis armored vehicles and fortifications for the first time. Limited to 60 mm high-explosive anti-tank (HEAT) rockets like the M6 series, the weapons delivered shaped-charge warheads capable of penetrating 2.5 to 3 inches of homogeneous armor at 100 yards, sufficient against lighter tanks but marginal against heavier German models at longer ranges.[71] Unique to this early series were operational drawbacks such as the launcher's heft, which fatigued troops during prolonged patrols or assaults, and vulnerability to back-blast hazards in confined spaces without adequate clearance. By late 1943, ongoing back-blast incidents and the need for a lighter design prompted the phase-out of M1/M1A1 units in frontline infantry roles, with replacement by the more compact M9 beginning in December 1943.[72][70]Improved shoulder-fired models (M9/M9A1)
The M9 Bazooka, introduced in October 1943, represented a significant refinement over earlier models, driven by combat feedback from operations like those in North Africa and the need for greater portability among infantry and paratroopers.[33] It featured all-metal construction with a two-piece launch tube connected by a quick-release coupling, allowing disassembly into 31.5-inch sections for easier transport, and weighed approximately 15 pounds unloaded.[33][73] The design included a sheet metal ribbon stock that could adjust to multiple shoulder positions, improved iron sights later upgraded to a T90 optical reflex sight for better accuracy, and an integral muzzle flash deflector to mitigate back-blast hazards.[33] These ergonomic enhancements addressed issues with the wooden furniture and cumbersome handling of the M1 series, while maintaining compatibility with the existing M6 series rockets.[18] The firing mechanism shifted to a magneto ignition system, replacing unreliable dry-cell batteries and enabling a sustained rate of fire up to 5 rounds per minute.[73] The M9A1 variant, adopted in June 1944, further improved reliability through an enhanced coupling assembly for the launch tube and refinements to the electrical system, including better protection against environmental damage such as moisture.[73][33] These changes made it more suitable for prolonged field use in varied conditions, with production reaching 277,819 units by war's end, far surpassing the M9's 26,087.[73] Feedback from the D-Day landings in Normandy highlighted ongoing concerns with weight and stability in the M1, prompting these iterative upgrades to prioritize mobility without sacrificing effectiveness.[18] The M9 and M9A1 saw their peak deployment during the Ardennes Offensive in late 1944 and early 1945, where their portability and short-range punch proved vital for ambushing German armor in close-quarters engagements like those at Losheim Gap and the Twin Villages.[74] Operators valued the folding stock for rapid setup and the reduced back-blast for safer firing from cover, contributing to its role as the primary shoulder-fired anti-tank weapon for U.S. forces in the European theater by that stage.[33]Super Bazooka (M20 series)
The M20 Super Bazooka, introduced in 1950, represented a significant post-World War II advancement in shoulder-fired anti-tank weaponry, featuring a 3.5-inch caliber, 60-inch length, and weighing approximately 15 pounds. It was developed primarily to counter the armored threats encountered in the early stages of the Korean War, such as North Korean T-34 tanks, where earlier 2.36-inch bazookas proved inadequate against their sloped armor. The launcher fired the M28A2 rocket, which delivered a shaped-charge warhead capable of penetrating up to 11 inches (280 mm) of armor, enabling effective engagement of contemporary Soviet-designed tanks.[75][76] Several sub-variants emerged to refine the design during production. The M20A1, introduced in 1952, incorporated improved optical sights for better accuracy under varied conditions. The M20B1 variant utilized an aluminum tube construction to reduce overall weight, enhancing portability for infantry use. The M20A1B1 combined these features, integrating the enhanced sights with the lighter aluminum body, and became the most produced model, with approximately 140,000 units manufactured in total across the series.[76][77] Key enhancements in the M20 series included a larger warhead diameter that achieved penetration parity with emerging Soviet systems like the RPG-7, along with a standard optical sight for improved targeting. The weapon underwent testing in 1948 as part of efforts toward NATO standardization, ensuring compatibility with allied forces. However, these upgrades came with limitations, such as an expanded back-blast radius of 25 meters that required greater crew separation and a slower reload process due to the bulkier rocket design. Production continued into the 1960s, after which surplus units were distributed to U.S. allies for continued use in various conflicts. The M20 saw its first combat deployment during the Korean War, where it proved vital in infantry anti-tank roles.[75][76][77]Multi-shot and international variants
The M25, developed by the United States Army in the mid-1950s as an experimental multi-shot variant of the Super Bazooka, featured a three-round overhead magazine and lever-action reloading mechanism mounted on a heavy-duty tripod for vehicle or aircraft integration.[78] This design allowed for sustained fire in defensive roles, with a 3.5-inch caliber compatible with M28A2 high-explosive anti-tank rockets, but production was limited to approximately 1,500 units due to the shift toward recoilless rifles and guided missiles.[79] It saw no combat deployment and remained in testing phases, primarily evaluated for anti-tank suppression against armored advances.[80] Internationally, the Belgian RL-83 Blindicide, produced by Mecar SA starting in the early 1950s, was an 83 mm adaptation of the M20 Super Bazooka with enhancements including a mechanical firing pin to eliminate magneto ignition wires, a fiberglass tube for durability and reduced weight (8.4 kg empty), and improved sights for better accuracy up to 400 meters effective range.[81] Capable of penetrating 300 mm of armor, it achieved a higher rate of fire (6-7 rounds per minute) than its American predecessor and was exported widely, including to France, Israel, Mexico, and Lebanon, where it served in conflicts through the 1980s.[82] Production continued until 1968, emphasizing portability with a foldable design for infantry use.[81] Spain's Instalaza M65, introduced in the 1950s as an evolution of the MOD.53 rocket launcher, utilized an 88.9 mm reusable aluminum tube with an updated electrical ignition system and local ammunition production to lower costs, weighing about 6.5 kg and offering reusability after each shot.[83] First operational in 1953 following project initiation in 1951, it was exported starting in 1962 to allies and saw limited combat, including potential evaluation in the 1957-1958 Ifni War against Moroccan forces.[83] The design prioritized cost-effective local manufacturing, with variants supporting high-explosive and smoke rounds for anti-armor and infantry support.[84] Among other derivatives, Argentina produced the 3.5-inch Hydroar in the post-war era as a direct copy of the M20 Super Bazooka, featuring a similar shoulder-fired configuration for anti-tank roles within the Argentine Army from the 1950s onward.[85] Overall, international Bazooka variants totaled around 10,000 units across these programs, often incorporating domestically produced ammunition to sustain affordability and logistics independence in smaller militaries. These adaptations highlighted multi-shot capabilities for rapid engagement and foreign modifications for enhanced reliability in diverse environments, though they were gradually supplanted by more advanced anti-tank systems by the 1970s.[75]Technical specifications
M1 Bazooka specifications
The M1 Bazooka, officially designated as the 2.36-inch Rocket Launcher M1, was the initial production model of this shoulder-fired anti-tank weapon, with the M1A1 variant introducing minor improvements such as simplified wiring and a wooden shoulder stock for better handling.[86] Key technical specifications for the M1 and M1A1 are summarized below:| Specification | Details |
|---|---|
| Dimensions | Length: 54 in (137 cm) Tube diameter: 2.36 in (60 mm) Weight: 12.75 lb (5.8 kg) unloaded[86] |
| Performance | Muzzle velocity: 265 ft/s (81 m/s) Effective range: 100 m Maximum range: 300 m Penetration: 3 in (76 mm) RHA at 0 m[86][2] |
| Crew and Operation | Crew: 2 (gunner, loader) Rate of fire: 5-6 rpm[86] |
| Sights and Feed System | Sights: Iron Feed system: Breech-loaded, single-shot[86] |
| Ammunition | Capacity: 1 round[86] |
| Service Life | Primary use: 1942-1944[58] |
M9 Bazooka specifications
The M9 Bazooka, officially designated as the 2.36-inch Rocket Launcher M9, was an improved shoulder-fired anti-tank weapon introduced in late 1943 to address limitations in the earlier M1 series, particularly in terms of tube length for better rocket stabilization and electrical reliability. The M9A1 variant, adopted in 1944, incorporated further refinements such as a quick-detach mechanism for easier disassembly and an optical T90 sight for improved aiming. These models emphasized portability while maintaining compatibility with shaped-charge rockets designed for armor penetration. Key technical parameters for the M9 and M9A1 are summarized below:| Parameter | Specification |
|---|---|
| Length (extended) | 61 in (155 cm) |
| Length (disassembled for carry) | 31.5 in (80 cm) |
| Weight (unloaded) | 15.14 lb (6.87 kg) |
| Muzzle velocity | 265 ft/s (81 m/s) |
| Effective range | 110 m (120 yd) |
| Penetration | 3.5–4 in (89–102 mm) rolled homogeneous armor (RHA) at 30 m |
| Crew | 2 (gunner and loader) |
| Rate of fire | 5–6 rounds per minute |
| Sights | Adjustable aperture (M9); T90 optical (M9A1) |
| Feed system | Rear-loaded, single-shot |
| Compatible ammunition | M6A3 HEAT rocket (total weight 3.5 lb / 1.6 kg) |
M20 Super Bazooka specifications
The M20 Super Bazooka, officially designated as the 3.5-inch Rocket Launcher M20, was an enhanced shoulder-fired anti-tank weapon introduced in 1950 to address the limitations of earlier Bazooka variants against thicker post-World War II armor.[87] It featured a larger 89 mm caliber tube and improved rocket propulsion for greater range and penetration, serving primarily in the Korean War and later conflicts until the 1970s.[75] The series included sub-variants such as the M20A1 (with improved connector latch) and lighter M20B1 (cast aluminum barrel, weighing about 5.9 kg unloaded).[87] Key specifications for the M20 series are summarized below, based on standard configurations without accessories unless noted.| Category | Specification | Source |
|---|---|---|
| Dimensions | Overall length: 60 in (1.52 m) assembled; tube diameter: 3.5 in (89 mm); barrel length: approximately 30 in (front section) | [38] [88] |
| Weight | 14.3 lb (6.5 kg) unloaded (M20/M20A1); 13 lb (5.9 kg) unloaded (M20B1); approximately 15 lb (6.8 kg) with bipod and monopod | [87] [88] |
| Crew | 2 (gunner and loader) | [87] [89] |
| Rate of Fire | 5-6 rounds per minute sustained | [87] [90] |
| Sights | Reflecting optical sight (mechanical/collateral type with reticle for range estimation); no fixed magnification specified | [88] [91] |
| Feed System | Single-shot, manually reloaded; open-bolt electric ignition | [38] [88] |
| Ammunition | Caliber: 89 mm (3.5 in); rocket types: M28/M28A1/M28A2 (HEAT, 9 lb/4.1 kg total weight, including 1.93 lb COMP B shaped charge); M29 (practice); M30 (smoke/white phosphorus); rocket length: 23.55 in | [38] [87] [92] |
| Performance | Muzzle velocity: 340 ft/s (104 m/s); effective range: 150 m (164 yd) against point targets; maximum range: 860-960 yd; penetration: 11 in (280 mm) rolled homogeneous armor (RHA) at 0° incidence with M28A1 HEAT rocket | [38] [89] [93] |
| Service | Entered service: 1950; phased out: 1970s; produced in large numbers (exact figures classified or unavailable in open sources) | [87] [75] |