The Colt Diamondback is a double action/single action revolver chambered in .38 Special, built on Colt's D-frame. Produced from 1966 to 1988, the Diamondback shares its compact frame size with the Colt Detective Special and Cobra but incorporates features drawn from the larger Python, including a ventilated rib barrel, full length underlug with shrouded ejector rod, and a fully adjustable rear sight. The action uses Colt's V-spring mechanism, and the cylinder rotates counterclockwise when viewed from the rear. The cylinder is released by pulling the latch rearward.

This example, serial number R12936, was manufactured between 1977 and 1978 and features a 4 inch ventilated rib barrel with a nickel finish throughout. The revolver is fitted with checkered wood grips with Colt medallions. Sights consist of a serrated ramp front and a fully adjustable rear. Crane movement is quite tight. Accompanied by maroon Colt box and an additional set of grips.

Specifications

• Manufacturer: Colt's Manufacturing Company
• Model: Diamondback
• Date of Manufacture: 1977-1978
• Serial Number: R12936
• Caliber: .38 Special
• Action: Double action/single action
• Barrel Length: 4 inches, ventilated rib
• Frame: D-frame, steel
• Finish: Nickel
• Grips: Checkered wood with Colt medallions
• Sights: Serrated ramp front, fully adjustable rear
• Capacity: 6 rounds