The S&W Model 19 Combat Magnum was developed at the request of Border Patrol agent Bill Jordan, who wanted a lighter .357 Magnum revolver. Built on the K-frame, it became one of the most popular police revolvers of the 20th century. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1957, USA Weight: 36 oz Overall length: 9.5" Status: Active Intended use: Duty, Carry, Sport