The USP45 Tactical features a factory threaded O-ring barrel, extended frame, and polygonal rifling optimized for suppressor use, making it one of the earliest factory suppressor-optimized pistols. Type: Semi-Auto Pistol Action: DA/SA Caliber: .45 ACP Capacity: 12 Year introduced: 1995, Germany Weight: 36.16 oz Overall length: 8.64" Status: Active Military use: Yes Intended use: Suppressor Host, Military, Law Enforcement