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Belt-fed (M2 or M9 links) The M2 machine gun or Browning .50 caliber machine gun (informally, " Ma Deuce " [ 14][ 15]) 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 for the .30-06 cartridge, the M2 uses Browning's larger and more ...
Rate of fire is the frequency at which a specific weapon can fire or launch its projectiles. This can be influenced by several factors, including operator training level, mechanical limitations, ammunition availability, and weapon condition. In modern weaponry, it is usually measured in rounds per minute (RPM or round/min) or rounds per second ...
Multiple-gun mounts were developed for the M2 Browning because the M2's rate of fire (450–550 rounds per minute) for a single gun was too low for anti-aircraft use. [2] The M45 found use throughout the war as a land-based weapon, particularly during the Battle of the Bulge.
The 12.7×81mm cartridge allowed the Type 1 to fire at a rate of 900 RPM, but the poor suitability of the Browning's action to synchronization reduced the rate of fire to 400 RPM in synchronized installations. However, the Japanese source and Allied Intelligence reports did not mention that this machine gun had a propeller synchronization flaw.
The Browning Automatic Rifle (BAR) is a family of American automatic rifles and machine guns used by the United States and numerous other countries during the 20th century. . The primary variant of the BAR series was the M1918, chambered for the .30-06 Springfield rifle cartridge and designed by John Browning in 1917 for the American Expeditionary Forces in Europe as a replacement for the ...
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The gun was mounted on a pedestal mount with three horizontal legs. It had a 500-650 rounds per minute rate of fire. Development continued and the M1921A1 was replaced by the water-cooled .50-caliber M2 Browning in 1933. Ground and aircraft air-cooled versions of the M2 were also adopted in 1934.
The M2 also appeared in a twin-mount version which paired two M2 guns with opposing feed chutes in one unit for operation by a single gunner, with a combined rate of fire of 2,400 rpm. All of the various .30 M2 models saw service in the early stages of World War II, but were phased out beginning in 1943, as hand-trained rifle-caliber defensive ...