The M14 is an American-made selective-fire battle rifle, in service since 1957. Although it was largely phased out after the Vietnam war, it remains in service with some Marine regiments. When fired semi-automatically, it can deliver powerful 7.62x51mm NATO or .308 Winchester rounds accurately. The Mk.14 EBR, or Mark 14 Enhanced Battle Rifle, is one of the models depicted in Medal of Honor (2010), alongside the M21 Battle Rifle. The difference between the Mk. 14 EBR and older models is its lighter telescoping stock and frame. The M21 variant is essentially the same as the older models, though it is scoped and its frame is made of polyethylene, as well as having only ten rounds in its magazine.