Wildey's gas-operated semi-automatic pistol in .45 Winchester Magnum uses a unique gas-regulated piston system allowing the shooter to tune operating pressure. Has had multiple manufacturers over its troubled production history. Type: Pistol Action: Semi-Automatic Caliber: .45 Win Mag Capacity: 7 Year introduced: 1979, USA Weight: 64 oz Overall length: 11" Status: Active Intended use: Hunting, Collecting