This is a late WWII Underwood manufacture M1 carbine that has been subsequently converted to a fully automatic "M2" carbine using some original and commercial M2 components. The rear receiver ring is marked: "UNDERWOOD/6135620" with the front ring marked "U.S. CARBINE/CAL .30 M1". It is currently fitted with an WWII Winchester marked replacement barrel stamped on top with a: "W/circled WP proof". It has a mix of early and late GI parts and is currently fitted with a late production round bolt, type three barrel band, flip safety and the late style adjustable rear sight. It has a commercial replacement M1A1 folding paratrooper stock and two rivet handguard. This carbine is complete with an extra 30-round magazine.
Very fine as converted to full auto with 95% of the arsenal refurbished parkerized finish overall with edge and high spot wear with a crack in the receiver (see close up photo). The stock is fine with signs of sanding and some alteration on the left side cutout. This gun is unsafe to fire as it stays in full auto after the trigger is pulled, no attempt should be made to shoot this weapon until a competent gunsmith repairs it. NOTE: This weapon is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 478.