Before the Browning M2, there was a series of Colt commercial .50 caliber machine guns. The .50 BMG (12.7x99mm) cartridge began development in 1918, and after the end of the war Colt and John Browning ...
Marines operating an M2 Browning machine gun mounted on a tripod at Khe Sanh Combat Base, Vietnam. (Bettmann Archive/Getty Images) For over a century the M2 Browning .50-caliber machine gun, known ...