The M14 is a selective-fire battle rifle that was developed in the United States during the late 1950s. It fires the 7.62×51mm NATO cartridge and was designed to replace the M1 Garand as the standard infantry rifle for the U.S. military. The M14 features a wooden stock and a gas-operated action, allowing for both semi-automatic and automatic firing modes. Although it was officially adopted in 1957, the M14 saw limited use during the Vietnam War, as it was quickly replaced by the M16 rifle. Today, the M14 is still used by some military and law enforcement units, as well as by civilian enthusiasts and collectors.