The Combat Magnum — K-frame in .357 Magnum developed with Bill Jordan. Standard duty revolver for American law enforcement through the 1970s. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1957, USA Weight: 35.5 oz Overall length: 9.5" Status: Discontinued Military use: Yes Intended use: Military Sidearm, Law Enforcement