Armscor Rock Island Rock Ultra FS 1911 45 ACP 5″

Description

The Rock Ultra FS is a full-size 1911-style pistol from Armscor / Rock Island Armory chambered in .45 ACP with a 5″ button-rifled barrel. It pairs a parkerized steel frame and slide with textured gray G10 grips and a full-length guide rod. Sights are a high-visibility fiber-optic front paired with an adjustable LPA-style rear; controls include an ambidextrous thumb safety and beavertail grip safety.

Key Specifications

• Chambered in .45 ACP.
• The barrel measures 5 inches and is button-rifled.
• Built on a steel frame and slide for durability.
• Finished in black parkerized coating.
• Equipped with gray G10 tactical grips.
• Sight package: fiber-optic front and LPA MPS1-type adjustable rear.
• Action type: single-action / semi-automatic.
• Includes a full-length guide rod for slide support.
• Controls include an ambidextrous thumb safety and beavertail grip safety.
• Ships with one magazine included.

The Rock Ultra FS delivers traditional 70-series 1911 ergonomics with upgraded features—suitable for range use, target work, or those who prefer a full-size .45 platform with modern sights and controls. Its combination of a button-rifled 5″ barrel, full-length guide rod, and G10 grips provides a solid baseline for reliable handling and follow-up accuracy.