The HK MK23 Mod 0 (Mark 23 SOCOM Offensive Handgun) was developed specifically for US Special Operations Command as a large-frame .45 ACP pistol with integrated suppressor and laser aiming module. The MK23 features a 5.87-inch threaded barrel, match-grade accuracy requirement (1.5 MOA at 25m), O-ring barrel seal for suppressor use, and ambidextrous controls. One of the most specialized and expensive production handguns ever fielded by the US military. Type: Pistol Action: DA/SA Caliber: .45 ACP Capacity: 12 Year introduced: 1996, Germany Weight: 42 oz Overall length: 9.65" Status: Active Military use: Yes Intended use: military, tactical