Thompson Center Arms 1927A-1 Deluxe 45 Auto (ACP) 16.5in Black Parkerized Semi Automatic Modern Sporting Rifle - 20+1 Rounds -The classic details of the time honored original are reproduced in today's semi-auto Thompson 1927-A1. This .45 caliber carbine features a 16.5in finned barrel and genuine American walnut woodwork. It has a blade front sight with an open rear adjustable sight. This Commando model is has a pinned compensator for an 18in barrel length. The frame and receiver are machined from solid steel with a black Parkerized metal finish. The walnut furniture has a durable, painted black finish. It includes one 20-round stick magazine and a black nylon sling. Sights: Blade Front / Open Adjustable Rear Genuine American walnut stock Finned barrel