Proof Research 18" 6.5 Grendel Carbon Fiber 1:7.5 Rifle .750 AR-15 Barrel

PROOF has designed their AR barrels with the goal of improving performance and reliability in the AR platform. Our Caliber Matched Gas System (CAMGAS) results in a gas system that is tuned specifically for the cartridge and length of the barrel. The AR-15 Platform was originally designed around the 223REM and 5.56NATO cartridges.

By moving the port location, PROOF ensures that the gas system pressure is the same as what the AR platforms were originally designed around. The result is a recoil impulse that is noticeably softer, less fouling in the receiver, increased reliability of extraction, and less wear and tear on brass. This helps keep you on target and shooting while taking advantage of the latest high performance cartridges.

• Barrel Length in Inches: 18in
• Twist Rate: 8
• Muzzle Thread: 5/8×24
• Gas System: Rifle
• Weight: 1lb-19oz
• Part Number: 121665
• UPC: 843068121665