The Smith & Wesson Model 25 is a usa-made double-action revolver chambered in .45 Colt / .45 ACP, introduced in 1955. Primary use: self_defense, law_enforcement. Type: Revolver Action: Double-Action Caliber: .45 Colt / .45 ACP Capacity: 6 Year introduced: 1955, USA Weight: 36 oz Overall length: 9.5" Status: Discontinued Intended use: self_defense, law_enforcement