The Rock Island Armory Rock Ultra is a single-action 10mm pistol with a 5-inch barrel, grey Cerakote finish, and 8-round capacity. It weighs 3.7 lbs and ships with one magazine. Sights are fixed front and adjustable rear. 
 

Key Specifications 

• Caliber: 10mm 
• Action: Single Action 
• Capacity: 8 Rounds (1 Magazine Included) 
• Barrel Length: 5 inches 
• Weight: 3.7 lbs. 
• Finish: Grey Cerakote 
   

Features 

• Single-action trigger 
• Fixed front sight, adjustable rear sight 
• Grey Cerakote for corrosion resistance 
• 5-inch barrel for improved accuracy 
   
  The 10mm cartridge delivers more energy than .45 ACP or 9mm, which makes the Rock Ultra relevant for handgun hunters and those who want a flatter-shooting defensive round. The single-action trigger and 5-inch barrel suit deliberate precision shooting over quick-draw carry.

The Rock Island Ultra 10MM in grey Cerakote gets solid marks as an affordable entry into the 10mm 1911 market. Owners point to reliable performance and good accuracy as the main positives. The grey Cerakote is appreciated for its durability and look -- it holds up to regular use better than standard bluing.

The 10mm caliber is cited as the primary reason people choose it over Rock Island's .45 ACP offerings. For handgun hunting or serious self-defense with a harder-hitting round, the platform makes sense.

Size and weight are the practical trade-offs. At 3.7 lbs with a 5-inch barrel, this is not a comfortable carry gun for most people. Some owners report a break-in period with initial feeding or ejection hiccups that resolve after a few hundred rounds. Compared to Kimber or Dan Wesson 10mm options at higher prices, the Rock Ultra is seen as a good value -- it works without the name-brand premium.