U.S. combat rifle M14 rifle with a 7.62 × 51 mm NATO bullet and single/continuous firing capability

 The American Rifle ( , M14) was an American combat rifle with a 7.62 × 51 mm NATO rifle and single - shot capability. Mostly replaced by M16 rifles in the United States Army, U.S. Marine Corps, and U.S. Navy, but limited use in the nama fields is limited. The M14 rifle is also the basis for the M21 sniper rifle and the M25 sniper rifle. It was also the type of rifle used only for five years (1959–1964), the shortest time in American history. The M14 EBR (Mk.14 EBR) is now modernized and used as a support rifle, and is used by the U.S. Marine Corps as an M39 EMR designated rifle to increase the length of the gun and remove the automatic firing system. In the United States, the M1A is sold to the private sector as a semi-automatic rifle, and is mainly used in hunting guns and shooting sports over the size of deer. In 1943, the ministry planned to completely and automatically renovate the M1 Galland. After research, the T20 was created in 1945 under the leadership of M1 designer John C.