Colt Diamondback .22 LR Revolver, 4 Inch Blued, DA/SA, 6-Shot, 1982 D-Frame with Vent Rib and Full Underlug
This Colt Diamondback in .22 LR is a 1982 production D-frame revolver with a 4 inch barrel, ventilated rib, and full-length underlug. It features a highly polished blued finish, adjustable sights, a wide serrated target hammer, and checkered walnut grips with gold Colt medallions. The serial on the crane/yoke matches the factory box end label, and the model code D5140 confirms the 4 inch blued .22 LR configuration.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are some superficial scratches and blemishes. The bore is clean and shiny. This revolver is clean and has been very well maintained.
What's Included
- Factory Colt woodgrain cardboard box with serial-numbered end label (Model D5140, .22 LR, 4-inch, blued; S/N P56898)
- Colt Safety and Instruction Manual for Agent, Commando Special, Detective Special, and Police Positive
- Colt Firearms Division congratulatory letter
This Diamondback is the desirable 4 inch .22 LR variant on Colt's D-frame, combining a ventilated rib with rectangular lightening slots and a full-length ejector shroud. The six-shot fluted cylinder and DA/SA action deliver the classic Diamondback profile in a rimfire chambering.
Construction is all steel with a carbon steel frame and a highly polished blued finish. The blued steel cylinder complements the finish, and the gun is outfitted with checkered walnut grips set with gold Colt medallions for a period-correct look and feel.
Sighting is handled by an adjustable setup: a serrated ramp front sight paired with a fully adjustable square-notch rear. A wide, serrated target hammer provides secure manipulation for both single-action and double-action use.
According to Colt's serial lookup, this revolver was manufactured in 1982. The model code D5140 designates the 4 inch blued .22 LR configuration, and the serial on the crane/yoke matches the factory box end label. Made in the United States, it comes with its factory box, manual, and Colt congratulatory letter.




