Originally manufactured and marked as a U.S. M1 semi-automatic carbine, it was upgraded at an unknown date into a select fire capable M2 Machine Carbine. "RIA" blade front and "PI" adjustable rear sights, with a "12-43" dated Inland barrel, "AI" type III bayonet lug, "J.A.O." selector switch, "EI" M2 magazine catch, cloth sling, and an unmarked M2 "perch belly" stock. A proper set of M2 components have been installed, with a milled Inland trigger group.