The 6-inch Model 581 was the long-barrel variant of the Distinguished Service Magnum, providing enhanced ballistic performance in the fixed-sight L-frame configuration for range and patrol use. Type: Revolver Action: DA/SA Caliber: .357 Mag Capacity: 6 Year introduced: 1981, USA Weight: 45.5 oz Overall length: 11.5" Status: Discontinued Intended use: Duty, Target