Colt M1991A1 Series 80 Government Model .45 ACP, Stainless (Brushed Flats/Matte Bead‑Blast), 5 Inch Barrel
This Colt M1991A1 Series 80 Government Model stands out as a stainless steel, full-size .45 ACP with the classic 1911 feel and proven Series 80 safety system. It features the early Colt ORM billboard slide rollmark, a brushed stainless slide with matte bead‑blasted rounds/top and a matte bead‑blasted stainless frame, and a 5 inch Government-length barrel. It comes with its factory-labeled Colt case, manual, one 7-round magazine, and an extra set of uninstalled synthetic grip panels.
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: The factory stainless finish (brushed flats on the slide; matte bead‑blast elsewhere) shows some scratches and blemishes.
What’s Included
- Colt factory blue plastic case with label (Model 01091)
- Manual
- 1x 7-round single-stack steel magazine
- Uninstalled checkered synthetic 1911 grip panels (carbon-fiber look), unbranded
Built on the 1911 platform, this Government Model features a 5 inch barrel with a standard bushing and a short GI-style recoil spring plug. The slide has brushed stainless flats with matte bead‑blasted rounds/top, and the frame is matte bead‑blasted stainless, offering the classic stainless look with reduced glare.
Controls include a single-side thumb safety, a standard slide stop, a grip safety with short GI spur, a spur hammer, and a short solid trigger. Safety features include the Series 80 firing-pin block. The slide has rear-only vertical cocking serrations and a lowered ejection port for reliable ejection.
Sights are fixed iron sights with a front blade and a rear square-notch, matching the Government Model pattern. Checkered hardwood grips with a double-diamond pattern are installed, providing a traditional Colt appearance and secure purchase. Capacity is 7+1 with the included single-stack 7-round magazine.
Markings include "COLT M1991A1 STAINLESS" on the left side of the slide and "— SERIES 80 —" on the right, plus the maker’s line "COLT'S PT. F. A. MFG. CO.
HARTFORD, CONN. U.S.A." on the frame. It is cataloged by Colt as Model 01091 (also referenced as O1091). The serial number is dot‑peen/micro‑percussion (dot‑matrix) engraved and matches the factory case label. Manufactured in the USA and listed as compliant for California.