All the classic details of the time honored original are reproduced in today's semi-auto Thompson 1927-A1. This .45 caliber carbine features a 16.5" finned barrel and genuine American walnut woodwork. It has a blade front sight with an open rear adjustable sight. This Lightweight Deluxe Semi-Auto model has a pinned compensator for an 18" barrel length. The frame and receiver are machined from a solid billet of aluminum with a blued metal finish, and a fixed buttstock, pistol grip and vertical foregrip. It includes one 20-round stick magazine.