The G21 Gen4 Threaded offers a factory .578x28 threaded barrel in the full-size G21 frame, enabling subsonic .45 ACP suppression without aftermarket barrel sourcing. Type: Semi-Auto Pistol Action: Striker-Fired Caliber: .45 ACP Capacity: 13 Year introduced: 2019, Austria/USA Weight: 26.28 oz Overall length: 7.59" Status: Active Intended use: Suppressor Host, Duty, Tactical