Rock Island Armory Rock Ultra FS 45 ACP 5″

The Rock Island Armory Rock Ultra FS is a full-size 1911-style pistol built on the traditional 70-series platform. Chambered in .45 ACP with a 5-inch button-rifled barrel, this model pairs a parkerized steel frame and slide with G10 tactical grips for a durable service-oriented package. It ships with a full-length guide rod, a high-visibility fiber-optic front sight and an adjustable low-profile rear sight, plus a beavertail frame, skeletonized hammer and trigger and ambidextrous safety. The Rock Ultra FS is intended for shooters seeking a well-equipped, full-size 1911 platform for range use and general-purpose carry among informed firearms owners.

Key Specifications

• The pistol is chambered in .45 ACP.
• The barrel measures 5 inches and is button-rifled.
• The finish is black parkerized for corrosion resistance and reduced glare.
• The frame and slide are constructed from steel.
• The grips are G10 tactical grips in a black/gray pattern.
• The sights are a fiber-optic front and an adjustable rear.
• The pistol includes a full-length guide rod.
• Safety features include an ambidextrous thumb safety and a beavertail grip safety.
• The slide is serrated for positive manipulation.
• The package includes one magazine and standard factory accessories.

Built as a well-optioned entry in Rock Island Armory’s Ultra FS series, this 1911 blends traditional design with practical upgrades—making it a strong choice for shooters who value a solid full-size platform with modern enhancements. Its sighting package, rugged finish and tactile G10 grips make it suitable for disciplined range work and any role where a dependable, service-style 1911 is desired.