The original Dornhaus & Dixon Bren Ten was the first production 10mm pistol, developed in collaboration with Jeff Cooper to launch the 10mm cartridge. Based on the CZ-75 design with modifications for the 10mm cartridge. Type: Pistol Action: Semi-Automatic Caliber: 10mm Capacity: 10 Year introduced: 1983, USA Weight: 38 oz Overall length: 8.75" Status: Discontinued Intended use: Collecting, Military Trials