The LWRC SMG-45 is a piston-operated .45 ACP pistol-caliber carbine using LWRC's short-stroke piston system adapted for the large pistol cartridge. Features LWRC's monolithic upper and accepts proprietary 26-round .45 ACP magazines. Type: Semi-Auto Rifle Action: Piston-Operated Caliber: .45 ACP Capacity: 26 Year introduced: 2018, USA Weight: 7.5 oz Overall length: 33" Status: Active Intended use: Home Defense, Range