The 3-inch Model 13 was the standard issue sidearm of the FBI from 1979 until the agency transitioned to semi-automatics. The compact barrel combined with the full K-frame grip made it the bureau's preferred compromise. Type: Revolver Action: DA/SA Caliber: .357 Mag Capacity: 6 Year introduced: 1974, USA Weight: 30 oz Overall length: 8" Status: Discontinued Intended use: Duty, Carry