M2 Browning
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The M2 machine gun or Browning .50 caliber machine gun 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... Wikipedia
Designed: 1918
Caliber: Browning .50 caliber machine gun
Action: Short recoil-operated
In service: 1933–present
Length: 1,654 mm (65.1 in); 1,429 mm (56.3 in) (AN/M2)
Manufacturer: Current > Fabrique Nationale; General Dynamics; Ohio Ordnance Works Inc. U.S. Ordnance;
Muzzle velocity: 2,910 ft/s (890 m/s) for M33 ball