The Colt Diamondback was a small-frame revolver chambered in .38 Special or .22 LR, featuring a ventilated rib barrel and adjustable sights in the same platform as the Detective Special. It represented Colt's mid-tier offering between the compact Detective Special and the premium Python, sharing the Python's visual features — ventilated rib, full-lug barrel — in a smaller package. Production ended in 1988 when Colt began scaling back revolver manufacturing. Type: Revolver Action: Double-Action Caliber: 38 Special Capacity: 6 Year introduced: 1966, USA Weight: 28.5 oz Overall length: 9" Status: Discontinued Intended use: law_enforcement, collector