The Auto-Ordnance Thompson 1927A1 is a semi-automatic rifle chambered in 45 ACP that comes standard with a 20-round stick magazine but it can accept stick or drum magazines of much higher capacities. Including the compensator available barrel lengths are 16.5 and 18 and they are accompanied by either walnut or black synthetic stocks fore grips and pistol grips. The Thompson 1927A1 includes a blade front sight and an adjustable rear sight. A sling mount rounds out the Thompson 1927A1s features. Details Action Semi-Auto - Caliber .45 ACP - Capacity 20rd 50rd - Barrel 16.5 Finned Blued - Sights Open Adjustable Rear Blade Front - Receiver Steel Blued - Stock Walnut Fixed - Grip Walnut - Forend Walnut - Length 41 - Weight 13 lbs. - Includes (1) 20rd stick magazine and (1) 50rd drum magazine