This is my m14 ebr (enhanced batte rifle). The m14 was designed back in the late fifties as a weapon to replace the m1 Garand. It fires 7.62 mm cartridges. The m14 first saw service in the vietnam war but was soon phased out because of cosst, recoil, and weight. The ebr stock was then but on when the Navy SEALS adaptoted it. Just so everyone knows the M21 is an m14 with a compitition model heavier barrel and several small changes. My MOC features the retracting four position stock, moving bolt, removable magazine, moving trigger.