The 4-inch Model 19 Combat Magnum is the definitive American police duty revolver of the 1960s–1980s. Developed at FBI agent Bill Jordan's request to put .357 Magnum power in a K-frame the size of a service .38. The 4-inch barrel struck the ideal balance of velocity and portability for patrol carry. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1957, USA Weight: 35.5 oz Overall length: 9.38" Status: Active Intended use: duty, law_enforcement, collector, historical