.50 BMG Cartridge

.50 BMG Cartridge

The .50 BMG — formally designated 12.7×99mm NATO and standardized under STANAG 4383 — is a .50-caliber (12.7mm) cartridge developed for the M2 Browning heavy machine gun in the late 1910s. It entered official U.S. military service in 1921 and has nev