Colt's redesigned service revolver line featuring an improved lockwork mechanism over the earlier Trooper and Officer's Model. The Mk III redesign eliminated some reliability issues of the older Colt action while maintaining the brand's characteristic trigger feel. Type: Revolver Action: Double-Action Caliber: .357 Mag Capacity: 6 Year introduced: 1969, USA Weight: 40 oz Overall length: 9.5" Status: Discontinued Intended use: Police, Target, Collecting