The M14 replaced the M1 Garand as the U.S. standard service rifle in 1959. Select-fire capable with detachable 20-round magazine; short service life as standard rifle due to replacement by M16 in Vietnam, but remained in specialized use for decades. Type: Rifle Action: Gas-Operated Caliber: 7.62x51mm NATO Capacity: 10 Year introduced: 1959, USA Weight: 104 oz Overall length: 43.5" Status: Discontinued Military use: Yes Intended use: military