The Rock Island Armory TAC Ultra FS HC AOS is a full-size 9mm pistol with a 5-inch barrel and a 16+1 round capacity. It has an optic cut slide (AOS) for mounting red dot sights directly without an adapter. The finish is black throughout. 
 

Key Specifications 

• Brand: Rock Island Armory 
• Model: TAC Ultra FS HC AOS 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 16+1 rounds 
• Barrel Length: 5 in 
• Color/Finish: Black 
   

Detailed Features 

• Full-size high-capacity (HC) frame with 16+1 round capacity 
• AOS optic cut slide for direct red dot mounting 
• 5-inch barrel in a full-size configuration 
• Black finish on frame and slide 
• Drilled and tapped for optic mounting without a riser

The TAC Ultra FS HC AOS draws buyers who want a high-capacity 1911-style pistol without paying premium prices. Owners find the full-size grip comfortable for extended range sessions, and the 16+1 capacity is the standout feature most frequently cited. The factory AOS optic cut is appreciated as a practical addition that saves the cost and hassle of an aftermarket milling job.

Fit and finish on Rock Island Armory pistols is a common point of discussion. Many owners report smooth function out of the box, while others note tighter break-in periods compared to higher-priced competitors. Trigger feel is generally viewed as acceptable for the price but not exceptional.

For the budget-conscious shooter who wants a full-size, optic-ready 9mm with a generous magazine capacity, the TAC Ultra FS HC holds its own. Aftermarket support is decent for the platform, and parts availability is not a concern for most owners.