The Springfield Armory M1A Standard in 7.62x51mm NATO with 22-inch barrel is the military-designation variant of the standard M1A, marked with the NATO chambering headstamp designation rather than the commercial .308 Winchester marking. Functionally identical to the .308 Win variant and accepts the same ammunition and magazines, the NATO designation appeals to military collectors and service rifle competitors. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 7.62x51mm NATO Capacity: 10 Year introduced: 1974, USA Weight: 9.3 oz Overall length: 44.33" Status: Active Intended use: Match, Military Simulation, Collecting