Proof Research AR-Style Barrel 6mm ARC 18″ Stainless Steel Finish

Proof Research 128688 AR-Style Barrel 6mm ARC 18″ Stainless Steel Finish & Material Rifle Length with Threading & .750″ Gas Journal Diameter for AR-Platform

We have designed our 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 and the AR-10 was designed around the 308 Win/7.62NATO round. With higher performance cartridges such as the 22 Nosler and 6.5 Creedmoor, the bore pressure remains higher further down the barrel. By moving the port location, we ensure 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.

Proof Research’s barrels exemplifies relentless pursuit of excellence. Whatever your preference is, you can expect the finest rifle barrel in the industry. The Traditional Steel barrel is long-lasting and extreme pressure resistant.

PR15 128688 18″ 7.5 Rifle +1 .750 5/8-24 2lbs-14oz