The LWRC SMG-45 is a .45 ACP AR-platform pistol using LWRC's short-stroke gas piston operation with an 8-inch barrel, Glock 21-compatible magazine feed, and full ambidextrous controls. It is one of the most sophisticated .45 ACP AR-format pistols in production. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 26 Year introduced: 2016, USA Weight: 80 oz Overall length: 25" Status: Active Intended use: Law Enforcement, Home Defense, Suppressor Host