Colt M1991A1 Government Model .45 ACP (Series 80, ORM) – 1992, 5-inch, Optic Cut With Plate, Trijicon Night Sights
This 1992 Colt M1991A1 Government Model is a Series 80, Old Rollmark variant in .45 ACP with a 5-inch bushing barrel. It features a matte dark steel frame and slide and is configured with an optic-cut slide complete with cover/adapter plate. Trijicon night sights and practical upgrades to the controls and grip frame make this a well-sorted, full-size 1911 with desirable ORM markings.
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.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Light handling marks from prior use are present. See photos for details.
What’s Included
- 1 steel single-stack 8-round magazine marked "45 ACP"
- Two holsters (one Kydex OWB/paddle with American flag graphic; second holster unspecified)
- Optic-cut slide with cover/adapter plate and mounting screws (installed)
- Trijicon rear night sight with matching night-sight front blade (installed)
- Aggressively textured synthetic grip panels (installed)
- Skeletonized three-hole trigger (installed)
- Grip safety (installed)
- Original parts (unspecified)
- Wilson Combat 5-inch full-size 15 lb recoil spring
- Wilson Combat 613B semi-extended slide release (.45 ACP)
- Wilson Combat extended magazine release
The Old Rollmark (ORM) configuration is identified by the large right-side "COLT M1991A1" rollmark. This example is a Government-length, 5-inch Series 80 pistol with the firing-pin safety, matte dark finish, and a classic 1911 profile without front cocking serrations. It was made in the United States in 1992.
The slide has been professionally milled for a miniature red dot and is currently fitted with a cover/adapter plate and mounting screws. The gun also wears Trijicon night sights: a tall front blade with a single dot and a Trijicon-marked rear night sight, providing a clear, high-visibility sight picture.
Ergonomics and handling are enhanced by a grip safety, a skeletonized three-hole trigger, and aggressively textured synthetic grips with a diagonal/golfball pattern. The slide features rear serrations only, and the hammer is the traditional spur style.
As a Series 80, it uses a single-action, locked-breech system with a firing pin block, and includes both a thumb safety and grip safety. Chambered in .45 ACP with an 8+1 capacity, this full-size 1911 maintains the reliable bushing-barrel layout and steel construction enthusiasts expect from a Colt Government Model.
Included extras add value and flexibility: two holsters, an optic cut with plate, and a set of Wilson Combat parts (recoil spring, semi-extended slide release, and extended magazine release), plus unspecified original parts.