The fifth and final Mark series Trooper from Colt, incorporating a transfer-bar safety and further refined lockwork. The Mk V was Colt's last attempt to modernize its traditional service revolver line before the company moved away from revolvers. Type: Revolver Action: Double-Action Caliber: .357 Mag Capacity: 6 Year introduced: 1982, USA Weight: 42 oz Overall length: 9.5" Status: Discontinued Intended use: Police, Collecting