Rock Island M1911 GI .45 ACP | 5″ Barrel | 51421-MA

The Rock Island Armory M1911-A1 GI is a full-size, factory-constructed interpretation of the classic U.S. GI 1911 pattern. Chambered in .45 ACP with a 5″ barrel, it pairs traditional 1911 ergonomics with a parkerized steel finish and smooth wood grips. Fixed low-profile sights and a 4–6 lb. factory trigger provide a straightforward, mechanical experience consistent with the original service design. This MA-compliant variant is configured with an 8+1 capacity and a beavertail safety for positive control.

For a red-dot optic that pairs well with this platform while staying under $1,000, consider a Holosun HS507C micro red dot; its footprint and size are compatible with many 1911 slide cuts and it offers a clear sight picture without obscuring the traditional sight radius. Suitable applications for this pistol include precision range training and competitive pistol formats that allow full-size 1911s.

Product Specifications

• Chambered in .45 ACP.
• Magazine capacity is 8+1 rounds.
• The barrel measures 5 inches for balanced handling.
• The action is Single Action.
• The frame is constructed from steel.
• The finish is black parkerized.
• The grips are smooth wood.
• Safety is a beavertail grip safety.
• Sights are fixed GI-style low-profile sights.
• The slide features serrations for improved manipulation.
• Trigger pull is specified at 4 to 6 pounds.
• Overall length is 8.5 inches.
• Weight is listed as 39.25 ounces.
• Includes one 8-round magazine.
• UPC is 4806015515012.

This M1911-A1 GI delivers the familiar controls and balance that experienced shooters expect from a full-size 1911. Its parkerized finish and steel construction favor longevity and straightforward maintenance, while the wood grips and fixed sights keep the interface traditional and predictable. Whether you prioritize a classic range gun, competition-ready platform, or a historically faithful 1911 experience, this model provides a solid mechanical baseline that responds well to competent handling and optics upgrades common among informed shooters.