The M14 Rifle, formally the United States Rifle, 7.62 mm, M14 is an American selective fire automatic rifle firing 7.62x51mm NATO (.308 Winchester) ammunition. It was the standard issue U.S. rifle from 1959 to 1970. The M14 was used for U.S. Army and Marine Corps basic and advanced individual training, and was the standard issue infantry rifle in CONUS, Europe, and South Korea, until replaced by the M16 rifle in 1970. It remains in limited front line service with the United States Army, Marine Corps, Navy, Air Force, and Coast Guard, and remains in use as a ceremonial weapon. It was the last so-called "battle rifle", a term applied to weapons firing full-power rifle ammunition, issued in quantity to U.S. troops. The M14 also provides the basis for the M21 and M25 sniper rifles.