The Proof Research PR10 Carbon Fiber Barrel in 6.5 Creedmoor at 22 inches (brand part no. 100639) runs Proof’s CAMGAS system, a gas configuration built to improve reliability while smoothing out the operating cycle and recoil impulse on AR-10-pattern rifles. Machined from 416R stainless steel and wrapped in carbon fiber, it is up to 64% lighter than a traditional steel barrel of similar contour, and Proof backs it with match-grade accuracy and improved heat dissipation for cooler, longer-lasting performance during high-volume shooting. A .875-inch gas block diameter and 5/8-24 threaded muzzle round out the barrel, and Proof’s heavy contour keeps the barrel from shifting point of impact even after repeated strings of fire. M4 feed ramps are cut into the barrel extension for reliable feeding.

Key Specifications

• Chambered in 6.5 Creedmoor.
• Measures 22 inches long.
• Cut with a 1:8 twist rate.
• Runs Proof’s CAMGAS gas system for smoother cycling and recoil impulse.
• Gas block diameter of .875 inches.
• Threaded 5/8-24 at the muzzle.
• Built from 416R stainless steel wrapped in carbon fiber, up to 64% lighter than an equivalent steel barrel.
• Uses M4 feed ramps for reliable feeding.
• Part of Proof’s AR-Style Barrel line.

Frequently Asked Questions

What is Proof’s CAMGAS system? A gas configuration built to improve reliability while smoothing the operating cycle and recoil impulse on AR-10-pattern rifles.

How much lighter is this barrel than steel? Up to 64% lighter than a traditional steel barrel of similar contour, thanks to Proof’s carbon fiber wrap.

What gas block size does this barrel use? .875 inches in diameter.

Buy the Proof Research PR10 CAMGAS Barrel

Run smoother and lighter with this Proof Research barrel, part of our full AR-10 barrels lineup. Order it from our Lubbock, Texas gun shop for fast, insured shipping.