HK HK45 Compact Tactical in .45 ACP with 3.94-inch threaded barrel. Suppressor-ready compact DA/SA pistol. Type: Pistol Action: Semi-Auto Caliber: .45 ACP Capacity: 8 Year introduced: 2010, Germany Weight: 27.5 oz Overall length: 7.2" Status: Active Intended use: Law enforcement / suppressed personal defense