The Mk 23 is the most powerful semi-automatic pistol ever fielded by US special operations forces. Developed under the Offensive Handgun Weapon System program for SOCOM, it includes a match-grade barrel and threaded muzzle for the HK suppressor. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 12 Year introduced: 1996, Germany Weight: 42 oz Overall length: 9.65" Status: Active Military use: Yes Intended use: Military, Special Operations