Colt Trooper MK III .357 Magnum Revolver, 4 Inch, Polished Blue, 1977, Adjustable Sights
Manufactured in 1977, this Colt Trooper MK III is a full-size .357 Magnum revolver built with the MK III redesign features, including a transfer-bar ignition system and coil mainspring. It pairs a 4 inch heavy-profile barrel and full-length ejector-rod shroud with a polished blue carbon-steel finish, adjustable iron sights, and checkered walnut grips with gold Colt medallions.
Condition
Overall Condition: Fair condition, showing extensive signs of prior use and handling.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in solid functional shape. The action is smooth, and lockup is tight. Scratches and blemishes are present. Rust and pitting are present throughout.
What’s Included
- Colt Trooper MK III .357 Mag. revolver
The MK III series introduced a transfer-bar safety system with coil mainspring and sintered-steel lockwork, offering a robust internal design distinct to this generation. This example is a double-action/single-action revolver with a smooth, curved trigger and a wide, checkered target-style hammer spur.
The 4 inch heavy-profile barrel features a solid, full-length ejector-rod shroud and a matte-serrated top rib to reduce glare. Sighting is handled by a pinned, serrated ramp front blade and a fully adjustable square-notch rear, giving the shooter precise, user-tunable alignment.
Construction is all carbon steel with a polished blue finish on the frame, cylinder, and barrel. The revolver wears checkered walnut grips with gold Colt medallions on a square butt, delivering a traditional Colt look in a full-size format.
Built on the Colt MK III medium frame (J-frame) unique to the MK III and Mark V families, the Trooper MK III line ran circa 1969–1983. This 1977 example is chambered in .357 Magnum with a 6-round cylinder and adjustable iron sights, made in the USA.