Rock Island Rock Ultra FS 1911 | .45 ACP | 5″ | MFG# 51486

The Rock Island Armory Rock Ultra FS is a full-size 1911-pattern handgun chambered in .45 ACP with a 5″ button-rifled barrel and a black parkerized steel finish. It ships with G10 tactical grips, a full-length guide rod, an ambidextrous safety, a fiber-optic front sight, and an adjustable rear sight—specifications intended for range use and competition. For a practical red-dot pairing under $1,000 consider the Vortex Venom 6 MOA reflex sight for fast target acquisition on a slide-mounted setup.

Product Specifications

• The manufacturer is Armscor/Rock Island Armory.
• The model/series is Rock Ultra FS (MFG# 51486).
• The caliber is .45 ACP.
• The barrel measures 5 inches and is button-rifled.
• The frame material is steel.
• The finish is black parkerized.
• The grips are G10 tactical grips.
• The sights are a fiber-optic front and a low-profile adjustable rear.
• The slide is described as serrated for enhanced purchase.
• The firearm is sized as full-size.
• The package includes one magazine.
• The firearm is listed as not drilled and tapped.
• The listed weight is 40 ounces.
• The product series is Ultra FS.
• The UPC is 4806015514862.

The Rock Ultra FS is presented as a traditional 70-series 1911 with a set of practical upgrades: a full-length guide rod, skeletonized hammer and trigger, extended beavertail grip safety, and an adjustable over-travel stop on the trigger. Those features make it a capable platform for range training, competitive pistol matches, and for shooters who prefer a full-size .45 ACP 1911 with modern ergonomic touches.

Owners commonly praise the Rock Ultra FS for its perceived value compared to similarly equipped 1911s and for the crisp factory trigger pull, often cited in the 4–6 pound range.