Receiver manufactured c. 1956. SA "1 55" dated barrel, "high hump" gas cylinder lock, SA trigger housing, hammer and safety with unmarked stamped trigger guard, replacement HRA operating rod and bolt, boxed DoD eagle cartouche stamped on left stock wrist with a circled serif "P" proof on underside front of the grip. Includes an incorrect Imperial M7 bayonet (does not fit the rifle) with M8A1 scabbard.