The Ruger Service-Six is a fixed-sight, square-butt variant of the Security-Six family. Where the Security-Six offered adjustable sights and round-butt options, the Service-Six was the plainest law enforcement configuration: fixed sights, square butt, blued or stainless finish. Adopted by numerous police agencies that wanted a simpler duty revolver than the adjustable-sight Security-Six. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1971, USA Weight: 33.5 oz Overall length: 9.25" Status: Discontinued Intended use: Law Enforcement, Service