Special Duty variant of the USP Tactical optimized for use with the HK suppressor, featuring an O-ring barrel seal and special suppressor-ready specifications for reduced sound signature. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 12 Year introduced: 1999, Germany Weight: 31 oz Overall length: 9.02" Status: Discontinued Military use: Yes Intended use: Military, Special Operations, Tactical