Colt Government Model MK IV Series 70 .45 ACP 5-Inch High-Polish Blue 1911
This 1981 Colt Government Model MK IV Series 70 is a full-size, collector-grade 1911 built during the desirable “B70” transitional period. It retains the original Series 70 collet-style barrel bushing, pre-Series 80 internal design, and Colt’s deep Royal Blue polish, making it a standout example for shooters and Colt enthusiasts alike.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good – Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling – Intact, well-defined lands and grooves.
Specific Condition Notes: The high-polish blue finish shows light edge wear and faint handling marks, consistent with careful range use. The bore is bright and free of corrosion, with sharp rifling.
What’s Included
- Tan Colt-branded zippered pistol rug
- One 7-round GI-pattern steel magazine with witness holes
Colt introduced the Series 70 collet bushing to improve barrel centering and accuracy without adding weight or complexity. This pistol still wears that original bushing, a feature often lost on later rebuilds.
The slide and frame are forged carbon steel finished in Colt’s Royal Blue polish. This deep, mirror-like finish is highly regarded and was phased out on later production guns, enhancing the pistol’s collectibility.
Fixed iron sights consist of a staked ramp front blade and a drift-adjustable rear notch—classic Government Model configuration that keeps the lines clean and snag-free.
Factory checkered walnut grips with inlaid gold Colt medallions add a period-correct touch and complement the wide-spur hammer, arched mainspring housing, and rear-only vertical cocking serrations.