The Model 581 Distinguished Service Magnum is a fixed-sight L-frame .357 Magnum with a pinned barrel, the service counterpart to the adjustable-sight Model 586. It was intended as a high-quality duty revolver for departments that did not require target-grade sights. Type: Revolver Action: DA/SA Caliber: .357 Mag Capacity: 6 Year introduced: 1981, USA Weight: 40.5 oz Overall length: 9.5" Status: Discontinued Intended use: Duty, Home Defense