The 7.62×51mm NATO cartridge is used mostly by NATO forces. It is larger and heavier than the other standard NATO round, the 5.56×45mm NATO. It was developed in the 1950s, for the M60 medium machine gun and the M14 rifle. When the M14 was superseded by the M16, the 7.62×51mm NATO was mostly replaced by the smaller 5.5×45mm NATO. However, it is still the standard round for medium machine guns, either mobile, mounted or even vehicle mounted, and for many sniper rifles.