Colt Trooper MK III .357 Magnum Revolver, 6-inch Blued, 1978, DA/SA, Adjustable Sights
This 1978 Colt Trooper MK III stands out with its 6-inch heavy-profile barrel, bright blue-black factory-style finish, and classic six-shot fluted cylinder. Built in the United States during the Mark III era, it features the updated transfer-bar ignition and coil mainspring lockwork, adjustable sights, and checkered walnut target-type grips with Colt medallions. It is a well-kept example with a clean, mirror-bright bore.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are minor, superficial scratches and blemishes present.
What's Included
- Colt Trooper MK III .357 Magnum revolver
The Trooper MK III series introduced Colt’s modernized lockwork with a transfer-bar safety and a coil mainspring, providing reliable double-action/single-action operation. This example retains those hallmark Mark III features and the Colt Rampant Horse logo on the frame.
The 6-inch steel barrel has a heavy profile with a non-ventilated solid rib and a shrouded ejector rod. Sighting is handled by a pinned ramp front sight with a serrated face and a fully adjustable square-notch rear, offering a clear and adaptable sight picture.
Its all-steel construction includes a blued frame, cylinder, and receiver, presenting the classic blue-black appearance described in period factory literature. The six-shot fluted cylinder complements the revolver’s balanced feel and traditional Colt styling.
Target-type checkered walnut grips with Colt medallions provide a secure hold and a period-correct look. Chambered in .357 Magnum, this Trooper MK III reflects Colt’s 1970s craftsmanship and the refinements that define the Mark III era.