The Rock Island Armory Rock Ultra CCO is a compact 1911-pattern pistol in 9mm with DA/SA action. At 4.2 inches of barrel and 7.4 inches overall, it fits the Officer's model footprint while holding 8 rounds. 
 

Key Specifications 

• Brand: Rock Island Armory 
• Model Name: Rock Ultra CCO 
• Caliber: 9MM LUGER 
• Action: DA/SA (Double Action/Single Action) 
• Capacity: 8 rounds 
• Barrel Length: 4.2 inches 
• Overall Length: 7.4 inches 
• Weight: 2.5 lbs (40 oz) 
• Sights: Fiber optic front sight / Adjustable LPA MPS1 rear sight 
• Grip Material: G10 Grips 
• Safety Type: Thumb safety 
• Finish: Black Parkerized 
• Condition: New in Box 
   

Detailed Features 

 
The DA/SA action means the first shot fires double-action (longer, heavier pull) and subsequent shots fire single-action, giving you a safety net on the first trigger press. The LPA MPS1 adjustable rear sight paired with the fiber optic front is a better-than-standard setup for a carry gun at this price. G10 grips grip well without being abrasive. The Parkerized finish is matte and corrosion-resistant, though not as durable as modern coatings under hard use. 
 
At 40 oz unloaded it's on the heavier end for a compact, which helps with felt recoil but adds to carry weight.

The Rock Ultra CCO attracts positive feedback from shooters who want 1911 ergonomics in a compact package.

Build quality is a frequent positive — the G10 grips, adjustable sights, and overall fit get credit as above-average for the price. The compact size makes it a reasonable concealed carry choice, and most owners report manageable recoil with the 9mm chambering. Trigger feel is generally well-received, with smooth operation noted at speed. The price-to-quality ratio comes up often as a selling point.

On the negative side, some find the 40 oz weight heavy compared to polymer compacts in the same class. Magazine capacity at 8 rounds is lower than many modern competitors. A few owners report feeding issues early on that cleared up with a break-in period. Aftermarket support and customization options are more limited than they would be with a full-size 1911.