The Rock Island Armory TAC Ultra FS HC is a full-size semi-automatic pistol chambered in .45 ACP with a 5-inch barrel and a 13-round capacity. It has an optic cut slide (AOS) for direct optics mounting and a black finish. The FS HC designation indicates a full-size frame with high-capacity magazine. 
 

Key Specifications 

• Brand: Rock Island Armory 
• Model: TAC Ultra FS HC 
• Caliber: .45 ACP 
• Action: Semi Auto 
• Capacity: 13 rounds 
• Barrel Length: 5 inches 
• Color/Finish: Black 
   

Detailed Features 

• 13-round magazine capacity in .45 ACP 
• AOS optic cut slide for direct optics mounting without an adapter 
• 5-inch barrel in a full-size frame 
• High-capacity (HC) configuration 
• Black finish throughout

Owners of the TAC Ultra FS HC generally land on it as a capable 1911-pattern pistol at a price well below the major American makers. The .45 ACP in a full-size frame with a 13-round magazine is a combination that draws attention, and most find the fit and function acceptable out of the box.

The AOS optic cut is a practical addition, though some owners note the cut tolerances require checking before assuming your specific optic will fit without play. Trigger feel is functional but rarely praised, and a few owners invest in a trigger job early. Reliability with quality ammunition is generally reported as solid; cheap steel-cased loads produce more complaints.

For the price tier, the TAC Ultra FS HC competes well. The main recurring criticism is finish quality on small parts and occasionally rough edges in the frame. Those willing to do basic hand-fitting and use quality magazines tend to report better long-term results.