Emilio Ghisoni's Mateba Autorevolver uses the recoil energy from firing to automatically rotate the cylinder and cock the hammer for subsequent shots, combining revolver and semi-automatic mechanisms. Fires from the bottom chamber. Type: Revolver Action: Semi-Automatic Caliber: .357 Mag Capacity: 6 Year introduced: 1997, Italy Weight: 47.6 oz Overall length: 9.06" Status: Discontinued Intended use: Collecting, Range