The Colt Lawman MK III in .357 Magnum with 4-inch barrel, the round-butt compact variant of the Trooper MK III family, designed for plainclothes and backup carry. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1969, USA Weight: 35 oz Overall length: 9" Status: Discontinued Intended use: Law Enforcement, Collecting, service, collecting