The Model 13 is a fixed-sight K-Frame .357 Magnum designed for duty use. The 3-inch heavy barrel version was famously selected by the FBI for its agents in the 1980s as the Bureau transitioned away from the 4-inch standard. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 1974, USA Weight: 34 oz Overall length: 8.5" Status: Discontinued Intended use: Duty, Carry