The Mk22 Mod 0, nicknamed the Hush Puppy, was developed for US Navy SEALs during the Vietnam War for quiet elimination of enemy sentries and guard dogs. Features an integral suppressor, slide lock for single-shot suppressed fire, and a subsonic 9mm load. Type: Semi-Auto Pistol Action: Double/Single-Action Caliber: 9mm Capacity: 14 Year introduced: 1967, USA Status: Discontinued Military use: Yes Intended use: Military, Special Operations, Collector