Thompson 1927A-1 .45 ACP Rifle, 16.5-Inch, 50-round drum, Used The Thompson 1927A-1 is a used .45 ACP rifle with a 16.5-inch barrel. The stated magazine configuration is a 50-round drum and 20-round magazine. Used condition is retained as a defining part of this firearm's identity. The drum and conventional magazine provide two distinct supplied magazine formats, with their individual capacities stated separately. Key Features Configuration: Thompson 1927A-1 Rifle. Barrel length: 16.5 inches. Magazine arrangement: 50-round drum and 20-round magazine. Specifications Model: Thompson 1927A-1 Type: Rifle Chambering: .45 ACP Barrel: 16.5 inches Condition: Used Magazine configuration: 50-round drum and 20-round magazine Shop the Thompson 1927A-1 .45 ACP Rifle, 16.5-Inch, 50-round drum, Used at BattleHawk Armory.