M2HB heavy machine gunTypePlace of originUnited StatesService historyIn service1933–presentUsed bySeeWarsProduction historyDesignerDesigned1918ManufacturerCurrent: General Dynamics, (FNH / FNA / FNHUK), Ohio Ordnance Works Inc. Contents.History Machine guns were heavily used in World War I, and weapons of larger than rifle caliber began appearing on both sides of the conflict. The larger rounds were needed to defeat the armor that was being introduced to the battlefield, both on the ground and in the air. During World War I, the Germans introduced a heavily armored airplane, the.
There are a total of 115 Vietnam War Guns (1955-1975) in the Military Factory. Entries are listed below in alphanumeric order (1-to-Z). Flag images indicative of country of origin and not necessarily the primary operator. Weapons such as hand grenades and portable artillery systems are also featured in this listing.
The armor made aircraft machine guns using conventional rifle ammunition (such as the ) ineffective.Consequently, the 's commander General asked for a larger caliber machine gun. Pershing asked the Army Ordnance Department to develop a machine gun with a caliber of at least 0.50 inches (12.7 mm) and a muzzle velocity of at least 2,700 feet per second (820 m/s). Col., commanding a machine gun school in France, observed the effectiveness of a French 11 mm (0.43 in) incendiary armor-piercing round. The Army Ordnance Department ordered eight experimental Colt machine guns rechambered for the French 11 mm cartridge. The French 11 mm round was found to be unsuitable because its velocity was too low. Pershing wanted a bullet of at least 670 gr (43 g) and a muzzle velocity of 2,700 ft/s (820 m/s).
Development with the French round was dropped.Around July 1917, John M. Browning started redesigning his.30-06 machine gun for a larger and more powerful round. Winchester worked on the cartridge, which was a scaled-up version of the.30-06. Winchester initially added a rim to the cartridge because the company wanted to use the cartridge in an anti-tank rifle, but Pershing insisted the cartridge be rimless. The first.50 machine gun underwent trials on 15 October 1918. It fired at less than 500 rounds per minute, and the muzzle velocity was only 2,300 ft/s (700 m/s).
Cartridge improvements were promised. The gun was heavy, difficult to control, fired too slowly for the anti-personnel role, and was not powerful enough against armor.While the.50 was being developed, some anti-tank rifles and ammunition were seized. The had a muzzle velocity of 2,700 ft/s (820 m/s), an 800 gr (52 g) bullet, and could pierce 1 in (25 mm) at 250 yd (230 m). Winchester improved the.50 caliber round to have similar performance.
Ultimately, the muzzle velocity was 2,750 ft/s (840 m/s).Efforts by John M. Browning and Fred T. Moore resulted in the water-cooled Browning machine gun, caliber.50,. An aircraft version was termed the Browning aircraft machine gun, caliber.50, M1921. These guns were used experimentally from 1921 until 1937.
They had light-weight barrels and the ammunition fed only from the left side. Service trials raised doubts whether the guns would be suitable for aircraft or for anti-aircraft use. A heavy barrel M1921 was considered for ground vehicles.John M. Browning died in 1926.
Between 1927 and 1932, S.H. Green studied the design problems of the M1921 and the needs of the armed services. The result was a single receiver design that could be turned into seven types of.50 caliber machine guns by using different jackets, barrels, and other components. The new receiver allowed right or left side feed.
In 1933, Colt manufactured several prototype Browning machine guns (including what would be known as the M1921A1 and M1921E2). With support from the Navy, Colt started manufacturing the M2 in 1933. (Fabrique Nationale) has manufactured the M2 machine gun since the 1930s. General Dynamics, U.S. Ordnance and Ohio Ordnance Works Inc. Are other current manufacturers.
A variant without a water jacket, but with a thicker-walled, air-cooled was designated the M2 HB ( HB for Heavy Barrel). The added mass and surface area of the heavy barrel compensated somewhat for the loss of water-cooling, while reducing bulk and weight: the M2 weighs 121 lb (55 kg) with a water jacket, but the M2 HB weighs 84 lb (38 kg). Due to the long procedure for changing the barrel, an improved system was developed called QCB (quick change barrel). The lightweight 'Army/Navy' prefixed AN/M2 'light-barrel' version of the Browning M2 weighing 60 pounds (27 kg) was also developed, and became the standard.50-caliber aviation machine gun of the World War II-era for American military aircraft of nearly every type, readily replacing Browning's own design in nearly all American aircraft installations.Design details The Browning M2 is an,.
The M2 fires from a, operated on the principle. The M2 fires the.50 BMG cartridge, which offers long range, accuracy and immense. The closed bolt firing cycle made the M2 usable as a synchronized machine gun on aircraft before and during World War II, as on the early versions of the fighter.The M2 is a scaled-up version of John Browning's, even using the same timing gauges.Features The M2 has varying cyclic rates of fire, depending on the model. The M2HB (heavy barrel) air-cooled ground gun has a cyclical rate of 450–575 rounds per minute.
The early M2 water-cooled AA guns had a cyclical rate of around 450–600 rpm. The AN/M2 aircraft gun has a cyclic rate of 750–850 rpm; this increases to 1,200 rpm for AN/M3 aircraft guns. These maximum rates of fire are generally not achieved in use, as sustained fire at that rate will wear out the bore within a few thousand rounds, necessitating replacement. In addition to full automatic, the M2HB can be selected to fire single-shots or at less than 40 rounds per minute, or rapid fire for more than 40 rounds per minute. Slow and rapid firing modes use 5–7 round bursts with different lengths of pause between bursts.
Marine mans a.50 caliber machine gun as part of a security force during a training exercise with the 24th Marine Expeditionary Unit in November 2002.The M2 has an effective range of 1,830 metres (2,000 yd) and a maximum effective range of 2,000 metres (2,200 yd) when fired from the. In its ground-portable, crew-served role as the M2HB, the gun itself weighs 84 pounds (38 kg) and the assembled M3 tripod another 44 pounds (20 kg). In this configuration, the V-shaped 'butterfly' trigger is located at the very rear of the weapon with a 'spade handle' hand-grip on either side of it and the bolt release in the center. The spade handles are gripped and the butterfly trigger is depressed with one or both thumbs. Recently, new rear buffer assemblies have used squeeze triggers mounted to the hand grips, doing away with the butterfly triggers.When the bolt release is locked down by the bolt latch release lock on the buffer tube sleeve, the gun functions in fully automatic mode. Conversely, the bolt release can be unlocked into the up position resulting in single-shot firing (the gunner must press the bolt latch release to send the bolt forward). Unlike virtually all other modern machine guns, it has no safety (although a sliding safety switch has recently been fielded to USMC armorers for installation on their weapons and is standard-issue for the U.S.
Army for all M2s). Troops in the field have been known to add an improvised safety measure against accidental firing by slipping an expended shell casing under the butterfly trigger. The upgraded M2A1 has a manual trigger block safety.
Twin M2HB machine gun during a Pre-aimed Calibration Fire (PACFIRE) exercise in May 2005Because the M2 was designed to operate in many configurations, it can be adapted to feed from the left or right side of the weapon by exchanging the belt-holding pawls, and the front and rear cartridge stops (three-piece set to include link stripper), then reversing the bolt switch. The operator must also convert the top-cover belt feed slide assembly from left to right hand feed as well as the spring and plunger in the feed arm. This will take a well trained individual less than two minutes to perform.The charging assembly may be changed from left to right hand charge.
A right hand charging handle spring, lock wire and a little 'know-how' are all that are required to accomplish this. The M2 can be battle-ready and easily interchanged if it is preemptively fitted with a retracting slide assembly on both sides of the weapon system. This eliminates the need to have the weapon removed from service to accomplish this task.At some point during World War 2 the Frankford Arsenal developed a version of the M2HB which reduced the bullet size from.50 to.30 caliber. Ammunition.
M2 Browning on a of theThere are several different types of ammunition used in the M2HB and AN aircraft guns. From through the, the big Browning was used with standard ball, armor-piercing (AP), armor-piercing incendiary (API), and armor-piercing incendiary tracer (APIT) rounds. All.50 ammunition designated 'armor-piercing' was required to completely perforate 0.875 inches (22.2 mm) of hardened steel armor plate at a distance of 100 yards (91 m) and 0.75 inches (19 mm) at 547 yards (500 m). The API and APIT rounds left a flash, report, and smoke on contact, useful in detecting strikes on enemy targets; they were primarily intended to incapacitate thin-skinned and lightly armored vehicles and aircraft, while igniting their fuel tanks.Current ammunition types include M33 Ball (706.7 grain) for personnel and light material targets, M17 tracer, M8 API (622.5 grain), M20 API-T (619 grain), and M962 SLAP-T. The latter ammunition along with the M903 SLAP (Saboted Light Armor Penetrator) round can perforate 1.34 inches (34 mm) of FHA (face-hardened steel plate) at 500 metres (550 yd), 0.91 inches (23 mm) at 1,200 metres (1,300 yd), and 0.75 inches (19 mm) at 1,500 metres (1,600 yd).
This is achieved by using a 0.30-inch-diameter (7.6 mm) tungsten penetrator. The SLAP-T adds a tracer charge to the base of the ammunition. This ammunition was type classified in 1993.When firing blanks, a large (BFA) of a special type must be used to allow the recoil operated action to cycle. This functions on the principle of a, to increase the recoil force acting on the short recoil action. This is the exact antithesis of a. Without this adaptor, the reduced-charge blank cartridge would develop too little recoil to cycle the action fully. The adapter is very distinctive, attaching to the muzzle with three rods extending back to the base.
The BFA can often be seen on M2s during peacetime operations.Deployment. 'Barbie III' showing four M2 feeds andThe M2.50 Browning machine gun has been used for various roles:. A medium infantry support weapon. As a light (AA) gun in some ships; up to six M2 guns could be mounted on the same turret. As an anti-aircraft gun on the ground. The original water-cooled version of the M2 was used on a tall AA tripod or vehicle-mounted anti-aircraft weapon on a sturdy pedestal mount. In later variants, twin and quadruple M2HB Brownings were used, such as the (aka 'meat chopper') used on the US carrier.
Twin or quad-mount.50 M2 guns normally used alternating left-hand and right-hand feed. Primary or secondary weapon on an. Primary or secondary weapon on a naval patrol boat. Spotting for the primary weapon on some. Secondary weapon for anti-boat defense on large naval vessels (corvettes, frigates, destroyers, cruisers, etc.).
or independent mounting in some tanks. Fixed-mounted forward-firing primary aircraft armament (AN/M2 and AN/M3 light-barrel versions only). The AN/M2 was used as primary armament in almost all World War II U.S. Aircraft (such as the, and ).
It was also used in fixed mountings in bombers and ground attack aircraft like the dive bomber, torpedo bomber, and medium bombers such as, and; usually 4–8 per aircraft but the bombers could mount 12 or more in certain configurations. The later, faster-firing electrically feed-boosted AN/M3 was used in many -era fighter aircraft such as the, and early versions of the bomber. The had largely completed their move to the (unrelated) for aircraft armament by this time.mount or flexible-mounted defensive armament, again only with the AN/M2 light-barrel version, in almost all US World War II-era bombers and patrol aircraft such as the, and heavy bombers, North American B-25 Mitchell and Marin B-26 Marauder medium bombers, patrol flying boats, Grumman TBF/TBM Avenger torpedo bombers, and in a combined offensive/defensive turret mounting in many.
The AN/M3 was used as a flexible, quad-mounted, radar-directed tail-defence gun as late as 1980 on the, until replaced by on the H model. Variants of the AN/M3 are used as flexible door guns or as flexible remotely-controlled armament subsystems on many US Army, Navy, Marine Corps and Coast Guard helicopters, such as the, and variants, and others.United States. An M2 overlooking the at, Afghanistan, in 2007The M2HB was not widely used in the Pacific campaign for several reasons, including the weight of the gun, the nature of infantry jungle combat, and because road intersections were usually easily outflanked.
However, it was used by fast-moving motorized forces in the Philippines to destroy Japanese blocking units on the advance to Manila. The was also used to destroy Japanese emplacements.The M2HB was used in and, and later in both, the Afghan theater of and in. In 2003, U.S.
Handheld 50 Cal Machine Guns
Army SFC used his M2HB mounted on an to kill 20 to 50 enemies who were attacking a U.S. Outpost, preventing an aid station from being overrun and allowing wounded soldiers to be evacuated, SFC Smith was killed during the firefight and was posthumously awarded the.M45 Quadmount.
M45.50 AA Quad aka the 'Meat Chopper'The M45 Quadmount was a mounting of four.50 M2HB guns with a single gunner situated behind an armored housing. This was used by U.S. AA battalions, fitted either on a towed trailer or mounted in a half-track carrier (M16 AA half-track). With 200 rounds per gun in a powered tracking mount, the guns proved very effective against low-flying aircraft. The use of four guns adequately compensated for the fact that the individual M2HB's rate of fire (450–550 rounds per minute) was low for an effective anti-aircraft weapon.Towards the end of the war, as attacks became less frequent, the quad.50 (nicknamed the Meat Chopper or Krautmower ) was increasingly used in an anti-personnel role, similarly to the earlier-introduced (1940) and more powerful—but much more difficult to keep well-fed with ammunition when in action—German 20 mm.
Snipers firing from trees were engaged by the quad gunner at trunk level; the weapon would cut down and destroy the entire tree, and the sniper with it.The M45 Quadmount was still in use during the Vietnam War.Commonwealth and other forces. M2HQCB.use of the M2 Browning.50 caliber machine gun (known as the.5 Browning in British and Commonwealth service) was limited in World War II, though from 1942 it was standard armament on US-built AFVs provided under lend-lease such as the, or variously used by British, Canadian, South African and New Zealand units. Nevertheless, the heavy Browning's effectiveness was praised by many British and Commonwealth soldiers in infantry, armored, and ordnance branches. Many commanders thought that the.50 Browning the best weapon in its class, certainly the best of the American weapons, including the.
In North Africa, after Commonwealth units began to obtain sufficient parts, manuals, gauges, and ammunition for the new weapon, the.50 Browning was increasingly used, eventually replacing the 15 mm Besa, but in Italy it was often deleted from top turret mountings because the mount exposed the operator to low branches and enemy fire. All, and some units used the aircraft (AN/M2) version of the gun, while beam/waist-mounted and turret-mounted Brownings were used later in the war in such aircraft as the and.After World War II, the.50 Browning continued to see action in and other theaters, in aircraft, tripod (ground), ground AA (hip-ring), and vehicle mounts. One of its most notable actions in a ground role was in a fierce battle with a nine-man SAS team at the in in July 1972, where the heavy Browning and its API ammunition was used to help repulse an assault by 250 Yemeni guerrillas, though the more famous weapon from the battle is a.A.50 caliber Browning was installed along with a.30 caliber Browning machine gun in each compact one-man turret on M113 APCs used by the Royal Australian Armoured Corps in South Vietnam.The M2HB has been in service with the since its establishment and has served in all of Israel's. In 2012 the IDF upgraded its M2HB machine guns to the M2HQCB model, with heavy quick change barrel.
Today the M2 serves as an infantry crew-served heavy machine gun, as a remote-controlled external on, as the main weapon on the and as a secondary weapons on and.Nigerian troops have extensively deployed the 50 caliber Browning, mounted on Otokar Cobra APCs, Panhard VBL M11s and Landcruiser gun-trucks in counterinsurgency operations in the Niger Delta, N.E Nigeria, the Jos Plateau and in MaliM2 as a sniper rifle. USMC M2 fitted with a Leupold CQBSS variable power scope.The M2 machine gun has also been used as a long-range, when equipped with a telescopic sight.
Soldiers during the Korean War used scoped M2s in the role of a sniper rifle, but the practice was most notably used by US Marine Corps sniper during the Vietnam War. Using an telescopic sight and a mounting bracket of his own design, Hathcock could quickly convert the M2 into a sniper rifle, using the traversing-and-elevating (T&E) mechanism attached to the. When firing semi-automatically, Hathcock hit man-size targets beyond 1,800 metres (2,000 yd)—twice the range of a standard-caliber sniper rifle of the time (a ). Hathcock set the record for the longest confirmed kill at 2,250 metres (2,460 yd), a which stood until 2002, when it was broken in Afghanistan by Canadian Army sniper.
Geneva Convention prohibition – a misconception It is often stated, sometimes even by military trainers, that it is illegal under the to use the M2 against enemy personnel since it would cause 'unnecessary suffering'. As such, most gunners supposedly aim for enemy troops' belt buckles, since those are technically equipment and thus permissible targets. However, there is no provision of the Geneva Convention that has ever been interpreted to forbid the use of the M2 on personnel. The misconception may have arisen during the or when U.S.
Troops were told to use their M2s only on enemy equipment due to shortages of ammunition. It is also possible that a restriction during the latter period limiting the use of the 's.50-caliber spotting gun to equipment only, since the M40 was meant to be used against armor and firing the spotting gun at personnel would have given away the M40's position before it could be used as intended, was mistakenly believed to apply to all weapons of that caliber and given legal justification. Variants and derivatives M2 variants. Soldier of the mans an M2HB in the.The basic M2 was deployed in U.S. Service in a number of subvariants, all with separate complete designations as per the US Army system.
The basic designation as mentioned in the introduction is Browning Machine Gun, Cal.50, M2, with others as described below.The development of the water-cooled machine gun which led to the M2, meant that the initial M2s were, in fact, water-cooled. These weapons were designated Browning Machine Gun, Cal.50, M2, Water-Cooled, Flexible. There was no fixed water-cooled version.Improved air-cooled heavy barrel versions came in three subtypes. The basic infantry model, Browning Machine Gun, Cal.50, M2, HB, Flexible, a fixed developed for use on the designated Browning Machine Gun, Cal.50, M2, HB, Fixed, and a 'turret type' whereby 'Flexible' M2s were modified slightly for use in tank turrets.
The subvariant designation Browning Machine Gun, Cal.50, M2, HB, TT was only used for manufacturing, supply, and administration identification and separation from flexible M2s. M2HB heavy machine gunA number of additional subvariants were developed after the end of World War II.
The Caliber.50 Machine Gun, Browning, M2, Heavy Barrel, M48 Turret Type was developed for the commander's cupola on the tank. The cupola mount on the M48A2 and M48A3 was thoroughly disliked by most tankers, as it proved unreliable in service. An externally mounted M2 was later adopted for the commander's position on the tanks. Three subvariants were also developed for use by the on a variety of ships and watercraft. These included the Caliber.50 Machine Gun, Browning, M2, Heavy Barrel, Soft Mount (Navy) and the Caliber.50 Machine Gun, Browning, M2, Heavy Barrel, Fixed Type (Navy).
The fixed types fire from a trigger and come in left or right hand feed variants for use on the Mk 56 Mod 0 dual mount and other mounts.Huaqing Machinery has made a clone of the M2HB known as the CS/LM6, which was released publicly in 2010 in foreign weapons expo conventions. It was made with a picatinny rail on the receiver in order to have quick installation of various optics.
The original M2HB tripod and parts can be used on the CS/LM6. M2E2 modification with quick-change barrel (QCB)When the M2 was first being designed, John Browning faced two design challenges. With the machine tools available at that time, the dimensions that established the location of the bolt face and the depth of the chamber could not be held tightly enough to control the fit of the cartridge in the chamber. The round can be too tight in the chamber and the gun would not shoot, or be too loose in the chamber, resulting in a stoppage or ruptured cartridge. The other dimension that could not be held close enough was when the firing pin would fall.
The solution to these problems was adjustable timing and headspace ('headspace' is the distance between the face of the bolt and the base of the cartridge case, fully seated in the chamber); the operator had to screw the barrel into the barrel extension, moving the barrel toward the bolt face to reach the proper headspace with simple gauges to allow the operator to adjust to the proper dimensions. By the late 20th century, the M2 was the only adjustable headspace weapon in the U.S.
With rising reports of injuries from improperly headspaced weapons, the U.S. Military held a competition for a quick change barrel conversion kit with fixed timing and headspace in 1997. Three companies offered kits and won the competition. However, funding was lost before the design could be fully evaluated and the program ended. In 2007, the military found money to start a new competition.
Saco Defense had since been acquired by, which won the competition. Army (RSOV) armed with RAMO M2HB-QCB machine gunOn October 15, 2010, the M2A1 heavy machine gun was type classified by the U.S. Formerly known as the M2E2, the M2A1 incorporates improvements to the design including a quick change barrel (QCB) with removable carrying handle, a new slotted flash suppressor that reduces muzzle flash by 95 percent, fixed headspace and timing, a modified bolt, and a manual trigger block safety.
'Timing' is the adjustment of the gun so that firing takes place when the recoiling parts are in the correct position for firing. When a standard M2 had a barrel change, the headspace and timing had to be manually set. Improper adjustment could damage the weapon and cause serious injury to the user. Fixed headspace and timing reduces risk, and the carrying handle allows the barrel to be switched in seconds. In June 2011, the Army began conversion of M2HB machine guns to M2A1s.
The M2A1 was named one of the greatest Army inventions of 2011. As of November 30, 2012, 8,300 built or converted M2A1s had been fielded by the U.S. Army; the program will upgrade the Army's entire M2 inventory of more than 54,000 guns.
The plans to upgrade all of their ground-mounted M2s to M2A1 standard from 2016 to 2018. The first phase of conversions was completed in March 2017, with 3,600 M2A1s planned to be fielded by the Marines in total. The adopted the M2-HQCB (the commercial version of the M2A1) in 2012 as a replacement to the M2HB. FN Browning M.1939 An important derivative of the M2 Browning is the, more commonly known as the FN Browning M.1939. The FN Browning M.1939 was a heavily modified M2 Browning for aircraft use designed by for export.
Their aim was to make a light, reliable heavy machine gun with the same damage output as a 20 mm autocannon. To achieve this they raised the firing rate to 1080 rpm and gave it a more powerful cartridge in form of the 13.2x99 mm Hotchkiss. This cartridge was basically a but with a 13.2 mm bullet (.52 in) and more explosive propellant. Besides the new cartridge they designed a new bullet exclusively for this gun.
The bullet was of a high explosive type and was designed to take down a small aircraft with a single hit. Tests showed that it was very effective against both cloth and aluminum skinned aircraft.Due to the aforementioned improvements the gun received interest from numerous nations when it entered the export market in 1939. Due to the start of World War 2 and the invasion of it was exported to only.
Sweden was able to buy the majority of the weapons along with the blueprints to produce the weapon on their own without paying for a license. In Sweden the weapon received the designation Automatkanon m/39, short Akan m/39, meaning Autocannon m/39 and was later produced by as the Akan m/39A. Sweden also gave the blueprints to so they could produce the weapon.
Since Finland was already producing 12.7 mm ammunition, the Finnish variant was rechambered to 12.7 mm (.50 bmg). The Finnish variant was designated VKT 12,70 LKk/42 and was produced by the state of Finland. Aircraft guns.50 Browning AN/M2.
Firing its eight M2.50 machine guns during night gunneryThe M2 machine gun was widely used during World War II, and in later postwar conflicts, as a remote or flexible aircraft gun. For fixed (offensive) or flexible (defensive) guns used in aircraft, a dedicated M2 version was developed called the '.50 Browning AN/M2' or the '12.7 mm AN/M2'.
The 'AN' stands for 'Army/Navy', since the gun was developed jointly for use by both services. The designation was also used for other aircraft guns and therefore it is important to write the caliber before the designation.The 12.7 mm AN/M2 had a cyclic rate of 600–800 rounds per minute, with the ability to be fired from an electrically operated remote-mount solenoid trigger when installed as a fixed gun. Cooled by the aircraft's slip-stream, the air-cooled 12.7 mm AN/M2 was fitted with a substantially lighter 36-inch (91 cm) length barrel, reducing the weight of the complete unit to 61 pounds (28 kg), which also had the effect of increasing the rate of fire.
The full official designation for this weapon was 'Browning Machine Gun, Aircraft, Cal.50, AN/M2' (Fixed) or (Flexible).The 12.7 mm AN/M2 was used on many aircraft during, as it served as the main aircraft armament in the US military. Most US fighter aircraft were armed with four, six or eight AN/M2 MGs mounted in the wings. Some famous examples being the, and for the and the, and the for the.
For bombers the AN/M2 was used in both flexible and fixed positions for both offensive and defensive use. In flexible defensive positions, the heavy bomber was armed with 13x AN/M2 guns in both turreted and flexible positions. In fixed offensive configurations, like on the, commonly carried 6 to 12 fixed guns for strafing.In foreign use the AN/M2 is often just referred to as the M2 Browning. In Sweden it was re-designated 12,7 mm automatkanon m/45 (short 12.7mm akan m/45) meaning 12.7 mm autocannon m/45. Note the used a different designation system which recognized the incendiary rounds as grenades, thus it was called autocannon.
The AN/M2 was also produced in Finland under the export name Colt MG 53-2.M296 The XM296/M296 is a further development of the AN/M2 machine gun for the helicopter. The M296 differs from previous remote firing variants in that it has adjustable firing rate (500–850 rpm), while lacking a bolt latch (allowing single-shot operation).
As an air-cooled gun used aboard a relatively slow rotary-wing aircraft, the M296 has a burst restriction rate of 50 rounds per minute sustained fire or 150 rounds per minute maximum while conducting peacetime training requirements; the combat firing rate is unrestricted but a ten-minute cooling period after prolonged firing is mandated to avoid stoppages due to overheating. XM213/M213, XM218, GAU-15/A, GAU-16/A, and GAU-18/A. This section does not any. Unsourced material may be challenged. ( December 2010) The XM213/M213 was a modernization and adaptation of existing.50 caliber AN/M2s in inventory for use as a mounted door gun on helicopters using the.The GAU-15/A, formerly identified as the XM218, is a lightweight member of the M2/M3 family. The GAU-16/A was an improved GAU-15/A with modified grip and sight assemblies for similar applications. Both of these weapons were used as a part of the (also known as the Defensive Armament System).The GAU-18/A is a lightweight variant of the M2/M3, and is used on the USAF's and helicopters.
These weapons use the M2HB barrel, and are typically set up as left-hand feed, right-hand charging weapons, but on the HH-60 Pave Hawks that use the EGMS (External Gun Mount System) the gun is isolated from the shooter by a recoil absorbing cradle and all weapons are set up as right hand charge but vary between left and right hand feed depending on what side of the aircraft it is on. A feed chute adapter is attached to the left or right hand feed pawl bracket allowing the weapon to receive ammunition through a feed chute system connected to externally mounted ammunition containers holding 600 rounds each.AN/M3, GAU-21/A, and M3P. Chinn, George M. (1951), The Machine Gun: History, Evolution and Development of Manually Operated, Full Automatic, and Power Driven Aircraft Machine Guns, 1, Department of the Navy, Bureau of Ordnance. Dunlap, Roy F.
Ordnance Went Up Front: Some Observations and Experiences of a Sergeant of Ordnance, who served throughout World War II with the United States Army in Egypt, the Philippines and Japan, including way stations. A Samworth Book on Firearms. Plantersville, SC: Small-Arms Technical Publishing Co.
George, John B. Shots Fired In Anger, NRA Press,. Gresham, John D. (December 2001). Volume 3, No. 3: 22, 24, 26, 28, 30 (John Browning's (M2).50-caliber).
Hogg, Ian. The American Arsenal.
Ian Hogg, ed. London, UK: Greenhill Books,. USMC (requires client certificate). Yeide, Harry. The Tank Killers.
Havertown, Penn.: Casemate,. Zaloga, Steven J. M8 Greyhound Light Armored Car 1941–91. Oxford, UK: Osprey Publishing,External links Wikimedia Commons has media related to. at.
at. at. at., 'Ambush in Mogadishu',.,. on.RecordsPreceded byLongest confirmed combat sniper-shot kill1967–20021.42 mi (2,286 m)using bySucceeded.
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