All the classic details of the time honored original are reproduced in todays semiauto Thompson 1927A1. 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 SemiAuto 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 20round stick magazine."