The Smith & Wesson Model 57 is a usa-made double-action revolver chambered in .41 Magnum, introduced in 1964. Primary use: self_defense, law_enforcement. Type: Revolver Action: Double-Action Caliber: .41 Magnum Capacity: 6 Year introduced: 1964, USA Weight: 36 oz Overall length: 9.5" Status: Active Intended use: self_defense, law_enforcement