Colt Government Model Mk IV Series 70 .45 ACP, 5-Inch, 1981 Production – Polished Blue, Walnut Double-Diamond Grips
Colt’s Mk IV Series 70 Government Model combines classic 1911 lines with the distinctive four-finger collet barrel bushing and deep-polish Colt blue finish that defined early 1980s production. Built in 1981, this full-size .45 ACP pistol retains the clean, crisp look collectors prize while offering the proven single-action performance shooters expect from a Series 70 Colt.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Rifling Condition: Excellent Rifling – Sharp lands and grooves.
Minor, superficial scratches and small blemishes are visible on the polished blue surfaces, consistent with careful handling. The bore remains bright and shiny.
What’s Included
- Colt Government Model Mk IV Series 70 pistol
- Three 7-round steel single-stack .45 ACP magazines
This late-production Series 70 (serial suffix “B70”) represents the final year before Colt transitioned to the Series 80 firing-pin safety system. As such, it maintains the original Series 70 lockwork, valued for its lighter, cleaner trigger pull.
The four-finger collet barrel bushing unique to the Series 70 helps enhance accuracy by centering the muzzle consistently in the slide. Coupled with the 5-inch carbon-steel barrel and tight slide-to-frame fit, it delivers reliable precision with standard .45 ACP loads.
Colt’s polished blue finish showcases a deep, high-gloss luster that brings out the flats of the slide and frame. Checkered walnut double-diamond grips with inset gold Colt medallions provide a classic aesthetic and secure purchase.
Vertical rear cocking serrations, a spur hammer, and fixed iron sights (staked ramp front, dovetailed rear notch) complete the traditional Government Model profile. Thumb and grip safeties, along with the single-action trigger, remain unchanged from John Browning’s original design.