This is a late WWII Underwood manufacture M1 carbine that has been converted to a fully automatic "M2" carbine using various original/commercial M2 components. The rear receiver ring is marked: "UNDERWOOD/2821767" with the front ring marked "U.S. CARBINE/CAL .30 M1" with the number "1" being over stamped with a "2". It is currently fitted with an original WWII Underwood barrel that is marked "UNDERWOOD/12-43", over the Ordnance Shell and Flame insignia. It has a mix of early and late GI parts and is currently fitted with a early production flat bolt, Inland marked trigger housing, type three barrel band, flip safety and the late style adjustable rear sight. It has a potbelly M2 type walnut stock with a two rivet handguard. This desirable carbine is complete with a one original 15 round blued magazine.