Thompson 1927A-1 Lightweight Deluxe Semi-Auto Aluminum Receiver Polymer Furniture – Shipped with one 20 round stick magazine and one 100 round drum magazine – All the classic details of the time honored original are reproduced in today’s semi-auto Thompson. The frame and receiver are machined from Aluminum Alloy. Walnut Grain Polymer Furniture. This .45 caliber carbine features a 16.5 finned barrel with a compensator. – Barrel: 18 Finned O/A .45 ACP – Length O/A: 41 – Material: Aluminum Alloy – Sights: Pinned in Front Blade Fixed Battle Rear – Stock: Walnut Grain Polymer Furniture – Weight: 8.05 lbs (w/o Magazine) – Magazines: 100 Rd Drum & 20 Rd Stick (T5P100D)