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The Mk 211 is a very popular .50 caliber sniper round used in the Barrett M82 rifle and other .50 BMG rifles. [4] It is also often used in heavy machine guns such as the M2 Browning, but not the M85. Due to its popularity, several U.S. arms manufacturers produce the round under license from NAMMO Raufoss AS. [6]
The M1 ammo crate held a total of 1,000 belted or linked rounds packed in 4 M1 ammo boxes and the later M1A1 ammo crate held a total of 1,000 belted or 1,100 linked rounds packed in M1A1 ammo boxes. There were two .50 M2 ammo boxes to a crate (for a total of 220 belted or 210 linked rounds) with a volume of 0.93 cubic feet.
The civilian headstamp has the "SBR" at 12 o'clock and the caliber at 6 o'clock. On the military headstamp the "SB" is at 12 o'clock and the "R" is at 6 o'clock. It manufactured 7,92mm Mauser and .303 British military ammunition because most of the regional powers used either captured German or Austrian war surplus or British military aid.
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., [1] is a .50 in (12.7 mm) caliber cartridge developed for the M2 Browning heavy machine gun in the late 1910s, entering official service in 1921.
The design has had many designations; the official U.S. military designation for the infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It has been used against infantry, light armored vehicles, watercraft, light fortifications, and low-flying aircraft.
The Twin Cities Ordnance Plant began production in March, 1942 making .30 Caliber, .50 Caliber and .45 Auto ammunition. In 1944 it began overhauling old .30- and .50-caliber ammunition by the use of machines that disassembled them into their components. It closed in September, 1945 due to the ending of the fighting in the Pacific.
Similarly to SLAP rounds (saboted light armor penetrator) which get their armor-piercing ability from the propulsion of a 7.62 mm tungsten heavy alloy bullet from a 12.7 mm barrel (.50 caliber) using a sabot with much more energy than is usually possible from a 7.62 mm round, HEIAP munitions utilize a similar theory with an added explosive ...
Barrett Firearms Manufacturing was founded by Ronnie Barrett for the sole purpose of building semi-automatic rifles chambered for the powerful 12.7×99mm NATO (.50 BMG) ammunition, originally developed for and used in M2 Browning machine guns.