Rock Island Armory Tac Ultra FS HC AOS Pistol, .45 ACP, 5-Inch Barrel, 13+1

The Rock Island Armory Tac Ultra FS HC AOS pistol in .45 ACP with a 5-inch barrel and 13+1 capacity (brand part no. 57171AOS) adds an optic-ready slide cut to the double-stack Tac Ultra HC platform. Armscor/Rock Island Armory fits fixed sights alongside the optic-ready cut, and the single-action trigger delivers the crisp break 1911 shooters expect. One 13-round magazine ships with the pistol. Among optic-ready, high-capacity 1911-pattern semi-auto handguns, this Tac Ultra FS HC AOS configuration favors shooters who want red dot compatibility on a double-stack 1911.

Key Specifications

• The chambering is .45 ACP, and the capacity is 13+1 rounds.
• The barrel measures 5 inches, with a 1-in-16 rifling twist.
• The slide is optic-ready, accepting a red dot directly.
• The sights are fixed, co-witnessing with an optic.
• The trigger action is single action.

Frequently Asked Questions

Is this pistol optic-ready? Yes, the slide is cut for direct red dot mounting.

What is the magazine capacity? 13+1 rounds of .45 ACP.

Buy the Rock Island Armory Tac Ultra FS HC AOS Pistol

Red dot compatibility on a double-stack .45 ACP 1911 is exactly what this Tac Ultra FS HC AOS delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.