HOME

TheInfoList



OR:

The .50 BMG (.50 Browning Machine Gun), also known as 12.7×99mm NATO, and designated as the 50 Browning by the C.I.P., is a caliber cartridge developed for the
M2 Browning The M2 machine gun or Browning .50-caliber machine gun (informally, "Ma Deuce") is a heavy machine gun that was designed near the end of World War I by John Browning. While similar to Browning's M1919 Browning machine gun, which was chambered ...
heavy machine gun in the late 1910s, entering official service in 1921. Under STANAG 4383, it is a standard service cartridge for
NATO The North Atlantic Treaty Organization (NATO ; , OTAN), also called the North Atlantic Alliance, is an intergovernmental organization, intergovernmental Transnationalism, transnational military alliance of 32 Member states of NATO, member s ...
forces. The cartridge itself has been made in many variants: multiple generations of regular ball, tracer, armor-piercing (AP), incendiary, and saboted sub-caliber penetrator rounds. The rounds intended for machine guns are made into a continuous ammunition belt using metallic links. The .50 BMG cartridge is also used in anti-materiel rifles. A wide variety of ammunition is available, and the availability of match grade ammunition has increased the usefulness of .50 caliber rifles by allowing more accurate fire than lower-quality rounds.


History

In response to the need for new anti-aircraft weaponry during
World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
, John Browning developed the .50 BMG. He wanted the round to be used in a machine gun based on a scaled-up version of the M1917 Browning. The development of the .50 BMG round is sometimes confused with the German 13.2 mm TuF, which was developed by Germany for an anti-tank rifle to combat British tanks during World War I and against aircraft. According to '' American Rifleman'': "Actually, the Browning .50 originated in the Great War. American interest in an armor-piercing cartridge was influenced by the marginal French design, prompting U.S. Army Ordnance officers to consult Browning. They wanted a heavy projectile at , but the ammunition did not exist. Browning pondered the situation and, according to his son John, replied, 'Well, the cartridge sounds pretty good to start. You make up some cartridges and we'll do some shooting.'"Barrett Tillman, American Rifleman, February 23, 2017, https://www.americanrifleman.org/articles/2017/2/23/the-50-cal-browning-machine-gun-the-gun-that-won-the-war/ The ''American Rifleman'' further explains that development was " putedly influenced by Germany's 13.2x92 mm SR (.525 in) anti-tank rifle" and that then "Ordnance contracted with Winchester to design a .50-cal. cartridge. Subsequently, Frankford Arsenal took over from Winchester, producing the historic .50 BMG (12.7×99 mm) cartridge. The Army then returned to John Browning for the actual gun. Teamed with Colt, he produced prototypes ready for testing and, ironically, completed them by Nov. 11, 1918—the Great War's end." The round was put into use in the M1921 Browning machine gun. This gun was later developed into the M2HB Browning, which, with its .50 caliber armor-piercing cartridges, went on to function as an anti-aircraft and anti-vehicular machine gun, capable of penetrating of face-hardened armor steel plate at , of rolled homogeneous armor at the same range, and at . During World War II the .50 BMG was primarily used in the M2 Browning machine gun, in both its "light barrel" aircraft mount version and the "heavy barrel" (HB) version on ground vehicles, for anti-aircraft purposes. An upgraded variant of the M2 Browning HB machine gun used during World War II is still in use today. Since the mid-1950s, some armored personnel carriers and utility vehicles have been made to withstand 12.7 mm machine gun fire, restricting the destructive capability of the M2. It still has more penetrating power than lighter weapons such as general-purpose machine guns, though it is significantly heavier and more cumbersome to transport. Its range and accuracy, however, are superior to
light machine gun A light machine gun (LMG) is a light-weight machine gun designed to be operated by a single infantryman, with or without an assistant, as an infantry support weapon. LMGs firing cartridge (firearms), cartridges of the same caliber as the othe ...
s when fixed on tripods, and it has not been replaced as the standard caliber for Western vehicle-mounted machine guns (Soviet and CIS armored vehicles mount 12.7×108mm NSVs, which have similar dimensions to .50 BMGs). Decades later, the .50 BMG was chambered in high-powered rifles as well. The Barrett M82 rifle was developed during the 1980s and, along with later variants, has upgraded the anti-
materiel Materiel or matériel (; ) is supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commerce, commercial supply chain management, supply chain context. Military In a military context, ...
power of the military sniper.


Typical uses

The primary military use of this round is in the M2 Browning machine gun and anti-materiel rifles such as the Barrett M82. The U.S. Coast Guard uses .50 BMG rifles onboard armed helicopters to disable the engines on boats during interdictions. Similarly, .50 BMG weapons have attracted attention from law enforcement agencies; they have been adopted by the
New York City Police Department The City of New York Police Department, also referred to as New York City Police Department (NYPD), is the primary law enforcement agency within New York City. Established on May 23, 1845, the NYPD is the largest, and one of the oldest, munic ...
as well as the Pittsburgh Police. A .50 BMG round can effectively disable a vehicle when fired into the engine block. A .50 BMG round will penetrate most commercial brick walls and concrete cinder blocks. The .50 BMG round was used as a sniper round as early as the
Korean War The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was s ...
. The former record for a confirmed long-distance kill was set by U.S. Marine sniper Carlos Hathcock in 1967 during the
Vietnam War The Vietnam War (1 November 1955 – 30 April 1975) was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam (Democratic Republic of Vietnam) and South Vietnam (Republic of Vietnam) and their allies. North Vietnam w ...
, at a distance of ; Hathcock used the .50 BMG in an M2 machine gun equipped with a telescopic sight. This weapon was used by other snipers, and eventually purpose-built sniper rifles were developed specifically for this round. In June 2017, a McMillan TAC-50 was used by a sniper with Canada's Joint Task Force 2 to kill an Islamic State insurgent in Iraq, setting the new world record for the longest confirmed kill shot in military history at . Before that, a British sniper in Afghanistan held the record at using an Accuracy International AWM L115A3 long-range rifle chambered for .338 Lapua Magnum (8.58×70 mm) rounds. In addition to long-range and anti-materiel, the U.S. military uses .50 BMG weapons to detonate unexploded ordnance from a safe distance. It can disable most unarmored and lightly armored vehicles. Some civilians use .50 caliber rifles for long-range target shooting: the US-based Fifty Caliber Shooters Association holds .50 BMG shooting matches.


Cartridge dimensions

The .50 BMG (12.7×99mm NATO) cartridge has a capacity of . The round is a scaled-up version of the .30-06 Springfield but uses a case wall with a long taper to facilitate feeding and extraction in various weapons. The common
rifling Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy. It is also the term (as a verb) for creating such groov ...
twist rate for this cartridge is 1 in , with eight lands and grooves. The primer type specified for this ammunition is a boxer primer that has a single centralized ignition point (US and NATO countries). However, some other countries produce the ammunition with Berdan primers that have two flash holes. The average chamber pressure in this round as listed in TM43-0001-27, the U.S. Army Ammunition Data Sheets — Small Caliber Ammunition, not including plastic practice, short cased spotter, or proof/test loads, is . The proof/test pressure is listed as .


Power

A common method for understanding the actual power of a cartridge is comparison of muzzle energies. The .30-06 Springfield, the standard caliber for American soldiers in both World Wars and a popular caliber amongst American hunters for medium to large game animals, can produce muzzle energies between . The .50 BMG round can produce between , depending on its powder and bullet type, as well as the weapon it is fired from. Due to the high ballistic coefficient of the bullet, the .50 BMG's trajectory also suffers less "drift" from crosswinds than smaller and lighter calibers, making the .50 BMG a good choice for high-powered sniper rifles.


Military cartridge types

The .50 BMG cartridge is also produced commercially in a wide range of specifications, including armor-piercing, tracing, and incendiary: ; Cartridge, caliber .50, tracer, M1 : This tracer is used for observing fire, signaling, target designation, and incendiary purposes. This bullet has a red tip. ; Cartridge, caliber .50, incendiary, M1 : This cartridge is used against unarmored, flammable targets. The incendiary bullet has a light blue tip ; Cartridge, caliber .50, ball, M2 : This cartridge is used against personnel and unarmored targets. This bullet has an unpainted tip. ; Cartridge, caliber .50, armor-piercing (AP), M2 : This cartridge is used against lightly armored vehicles, protective shelters, and personnel, and can be identified by its black tip. ; Cartridge, caliber .50, armor-piercing incendiary (API), M8 : This cartridge is used, in place of the armor-piercing round, against armored, flammable targets. The bullet has a silver tip. ; Cartridge, caliber .50, tracer, M10 : Tracer for observing fire, signaling, target designation, and incendiary purposes. Designed to be less intense than the M1 tracer, the M10 has an orange tip. ; Cartridge, caliber .50, tracer, M17 : Tracer for observing fire, signaling, target designation, and incendiary purposes. Can be fired from the M82/M107 series of rifles. ; Cartridge, caliber .50, armor-piercing incendiary tracer (API-T), M20 : This cartridge is used in place of the armor-piercing round against armored, flammable targets, with a tracer element for observation purposes. It is effectively a variant of the M8 armor-piercing incendiary with the added tracer element. Can be fired from the M82/M107 series of rifles. This bullet has a red tip with a ring of aluminum paint. ; Cartridge, caliber .50, tracer, headlight, M21 : Tracer for use in observing fire during air-to-air combat. Designed to be more visible, the M21 is three times more brilliant than the M1 tracer. ; Cartridge, caliber .50, incendiary, M23 : This cartridge is used against unarmored, flammable targets. The tip of the bullet is painted blue with a light blue ring. ; Cartridge, caliber .50, ball, M33 : This cartridge is used against personnel and unarmored targets. Can be fired from the M82/M107 series of rifles. ; Cartridge, caliber .50, saboted light armor penetrator (SLAP), M903 : This cartridge has a 355 – 360 gr (23.00 – 23.33 g) heavy metal (tungsten) penetrator that is sabot-launched at a muzzle velocity of 4,000 ft/s (1,219 m/s). The 0.50 in (12.7 mm) diameter sabot is designed to separate after leaving the muzzle, releasing the 0.30 in (7.62 mm) penetrator. The sabot is injection molded of special high strength plastic and is reinforced with an aluminum insert in the base section. The cartridge is identified by an amber sabot (Ultem 1000). Used only in the M2 series of machine guns. This round can penetrate 0.75 in (19 mm) of steel armor at . ; Cartridge, caliber .50, saboted light armor penetrator tracer (SLAP-T), M962 : Like the M903, this is a SLAP round, with the only difference being that the M962 also has a tracer element for observing fire, target designation, and incendiary purposes. It has a red plastic sabot for identification and is used only in the M2 series of machine guns. ; Cartridge, caliber .50, ball, XM1022 : A long-range match cartridge specifically designed for long-range work using the M107 rifle. ; Cartridge, caliber .50, M1022 long-range sniper : The .50 caliber M1022 has an olive-green bullet coating with no tip ID coloration. The projectile is of standard ball design. It is designed for long-range sniper training and tactical use against targets that do not require armor-piercing or incendiary effects. It exhibits superior long-range accuracy and is trajectory matched to MK211 grade A. The M1022 is ideal for use in all .50 caliber bolt-action and semi-automatic sniper rifles. The bullet remains supersonic from to . ; Cartridge, caliber .50, high-explosive incendiary armor-piercing (HEIAP), Mk 211 Mod 0 : A "combined effects" cartridge, the Raufoss Mk 211 Mod 0 HEIAP cartridge contains a .30 caliber tungsten penetrator, zirconium powder, and Composition A explosive. It can be used in any .50 caliber weapon in the US inventory with the exception of the M85 machine gun. The cartridge is identified by a green tip with a gray ring. ; Cartridge, caliber .50, armor-piercing incendiary dim tracer (API-DT), Mk 257 : The .50 caliber Mk 257 API-DT has a purple bullet tip. The bullet has a hardened steel core and incendiary tip. It is used in the M2, M3, and M85. Dim tracer reduces the possibility of the weapon being located during night fire and is visible only with night-vision devices. ; Cartridge, caliber .50, armor-piercing (AP), Mk 263 Mod 2 : The .50 caliber Mk 263 has a black tip. The bullet has a hardened steel core and features double valleys to reduce bearing surface thereby decreasing friction and increasing stability. It is used in the M2, M3, and M85. ; Cartridge, caliber .50, armor-piercing incendiary tracer (API-T), Mk 300 Mod 0 : as with the Mk 211 Mod 0, but with a tracer component. This cartridge likely can be used in any .50 caliber weapon in the US inventory with the exception of the M85 machine gun, as with the Mk 211 Mod 0. ; Cartridge, caliber .50, armor-piercing explosive incendiary (APEI), Mk 169 Mod 2 : This cartridge is used against hardened targets such as bunkers, for suppressive fire against lightly armored vehicles, and ground and aerial threat suppression. It is generally fired either from pilot-aimed aircraft-mounted guns or anti-aircraft platforms, both produced by FN Herstal. It is identified by a gray over yellow tip. A tracer variant of it also exists. ; Cartridge, caliber .50, ball, Mk 323 Mod 0 : Created by the Naval Surface Warfare Center Crane Division, this cartridge uses M33 ball projectiles in polymer cases instead of brass. It has a clear polymer case, with a standard brass head fused at the bottom. The Mk 323 can be fired from M2HB/M2A1 machine guns and GAU-21/A aircraft guns with the same performance. It gives a 25 percent weight saving over brass-cased ammunition allowing 40 percent more ammunition to be carried for the same weight. The Mk 323's polymer casing is applied to tracer, AP, API, and SLAP projectiles.
DARPA The Defense Advanced Research Projects Agency (DARPA) is a research and development agency of the United States Department of Defense responsible for the development of emerging technologies for use by the military. Originally known as the Adva ...
(Defense Advanced Research Projects Agency) contracted with Teledyne Scientific Company to develop the EXACTO program, including a .50-caliber guided bullet. Videos published by DARPA show the guided bullet diverting to strike a moving target.


Belt links

Three distinct and non-compatible metallic links have been used for .50 BMG cartridge belts. The M2 and M9 links, "pull-out" designs, are used in the Browning M2 and M3 machine guns. The M15-series metal "push-through" links were used in the M85 machine gun. Pull-out cloth belts were also used at one time but have been obsolete since 1945. File:M2 M9 links.gif, M2 and M9 links File:M15A2 link.gif, M15A2 link File:Defense.gov photo essay 120814-F-QT695-001.jpg, M9 links in use


Legal issues


United Kingdom

Within the United Kingdom, it is legal to own a bolt action .50 BMG rifle with a section 1 Firearms Certificate. Applications requesting firearms in this caliber are assessed by the same criteria as smaller calibers; with the applicant having to prove they have a valid reason for owning such a weapon.


United States

The specified maximum diameter of an unfired .50 BMG bullet is ; while this appears to be over the .50 inch (12.7 mm) maximum allowed for non-sporting Title I firearms under the U.S. National Firearms Act, the barrel of a .50 BMG rifle is only .50 inch (12.7 mm) across the
rifling Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy. It is also the term (as a verb) for creating such groov ...
lands and slightly larger in the grooves. The oversized bullet is formed to the bore size upon firing, forming a tight seal and engaging the rifling. Subject to political controversy due to the great power of the cartridge (it is the most powerful commonly available cartridge not considered a destructive device under the National Firearms Act), it remains popular among long-range shooters for its accuracy and external ballistics. While the .50 BMG round is able to deliver accurate shot placement (if match grade ammunition is used) at ranges over , smaller-caliber rifles produce better scores and tighter groups in competitions. A 1999 Justice Department Office of Special Investigations briefing on .50 caliber rifle crime identified several instances of the .50 BMG being involved in criminal activities. None of the cited cases has confirmed domestic violent criminal use of a .50 BMG firearm, and a majority of the domestic cases were possession charges. In the United States, Washington, D.C. disallows registration of .50 BMG rifles, thus rendering civilian possession unlawful.
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
prohibits the private purchase of a rifle capable of firing the .50 BMG through the .50 Caliber BMG Regulation Act of 2004.
Connecticut Connecticut ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York (state), New York to the west, and Long Island Sound to the south. ...
specifically bans the Barrett 82A1 .50 BMG rifle. However, .50 BMG rifles registered prior to the enacted bans remain lawful to possess in California and Connecticut. In
Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash River, Wabash and Ohio River, Ohio rivers to its ...
, it is legal to possess a .50 caliber rifle only if it was acquired by January 10, 2023, and it was registered with the state police by January 1, 2024.
Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...
imposes additional regulations on the sale and transfer of .50 BMG rifles and other weapons classed as "regulated firearms", and limits purchases of any firearm within this class to one per month, but does not impose registration requirements or any form of categorical ban. Contrary to a persistent misconception within the
United States Armed Forces The United States Armed Forces are the Military, military forces of the United States. U.S. United States Code, federal law names six armed forces: the United States Army, Army, United States Marine Corps, Marine Corps, United States Navy, Na ...
, using .50 BMG directly against enemy personnel is not prohibited by the laws of war. Writing for the '' Marine Corps Gazette'', Major Hays Parks states: "No treaty language exists (either generally or specifically) to support a limitation on he use of .50 BMGagainst personnel, and its widespread, longstanding use in this role suggests that such antipersonnel employment is the customary practice of nations." Parks theorizes that the misconception originated in historical doctrine discouraging the use of the M8C spotting rifle—an integral .50-caliber aiming aid for the M40 recoilless rifle—in the antipersonnel role. This limitation was entirely tactical in nature and was intended to hide the vulnerable M40 and its crew from the enemy until the main
anti-tank Anti-tank warfare refers to the military strategies, tactics, and weapon systems designed to counter and destroy enemy armored vehicles, particularly tanks. It originated during World War I following the first deployment of tanks in 1916, and ...
gun was ready for firing; however, Parks concludes that some U.S. troops assumed the existence of a legal limitation on the use of .50-caliber projectiles more generally.


Partial list of .50 BMG firearms


Carbines

* Barrett M82CQ (a carbine version of the M82A3)


Rifles

* Accuracy International AS50 * Accuracy International AW50 * Accuracy International AX50 * ArmaLite AR-50 * Arms Tech Ltd. TTR-50 * Barrett M82/M107 * Barrett M95 * Barrett M99 * Bushmaster BA50 * Cadex Defence CDX-50 Tremor * Desert Tech HTI * DSR-50 * Gepárd anti-materiel rifle * McMillan TAC-50 * OM 50 Nemesis * PGM Hécate II * Pindad SPR-2 * Ramo M600 * Robar RC-50 * Snipex M * Snipex Rhino Hunter * Steyr HS .50 * WKW Wilk * Zastava M93 Black Arrow


Machine guns

* GAU-19 * GAU-21 FN M3M * M1921 Browning machine gun * M2 Browning machine gun * M85 machine gun * MAC-58 - only built as prototype * Rolls-Royce Experimental Machine Gun - only built as prototype * STK 50MG * XM218 * XM312 * XM806 (LW50) * Kord machine gun - export variant * NSV machine gun - export variant of the original West Kazakhstan Machine Building Company NSV machine gun * WKM-B - Polish version of the NSV machine gun * Zastava M87 - Serbian export variant of the NSV machine gun


Pistols

* Triple Action Thunder


Chain gun

* Profense PF 50


See also

* .50 Caliber BMG Regulation Act of 2004 * .50 caliber handguns * .510 DTC EUROP * .510 Whisper * 12 mm caliber * 12.7 × 108 mm (Russian equivalent) * 14.5 × 114 mm * Gun laws in the United States (by state) * List of firearms * List of rifle cartridges * NATO EPVAT testing * Table of handgun and rifle cartridges


References

{{Current Indian infantry weapons
50 BMG The .50 BMG (.50 Browning Machine Gun), also known as 12.7×99mm NATO, and designated as the 50 Browning by the C.I.P., is a 12mm caliber, caliber cartridge developed for the M2 Browning heavy machine gun in the late 1910s, entering official s ...
50 BMG The .50 BMG (.50 Browning Machine Gun), also known as 12.7×99mm NATO, and designated as the 50 Browning by the C.I.P., is a 12mm caliber, caliber cartridge developed for the M2 Browning heavy machine gun in the late 1910s, entering official s ...
12.7x99mm NATO cartridges Weapons and ammunition introduced in 1921 Winchester Repeating Arms Company cartridges