Montana-based PROOF Research has unveiled its new Caliber Matched Gas System (CAMGAS) barrels, which get rid of the hassles you face when building 6.5mm and .260 rifles on 308AR/AR-10 platforms; major hassles like excessive bore pressures that force you to clip buffer springs, adjust buffer weights, and rely on adjustable gas blocks just to keep your rifle working properly. These new CAMGAS barrels, chambered for 6.5mm Creedmoor and  .260 Remington, are available in three lengths:  20, 22, and 24 inches. The suggested retail price is $940, and a custom-length gas tube is included. Read the release below to learn more.

PROOF’s R&D team has solved the overpressure issue with gas systems tuned specifically to the cartridge/barrel-length combination. “By moving the gas port, the pressure in the bore is given time to reduce to that comparable of a .308 Winchester with a rifle-length gas system, which is what the 308AR/AR-10 system was designed around,” said Greg Hamilton, PROOF’s research-and-development weapons specialist who’s also a 3-Gun and PRS competitive shooter. “The recoil impulse is noticeably smoother, which helps keep you on target while taking advantage of a more efficient projectile. Case extraction is also easier, with less case-head smearing, so the brass is in much better condition for reloading.”

In recent years, 6.5mm Creedmoor and .260 Remington have become increasingly popular in long-range shooting competitions. The .260 in particular represents an outstanding caliber for a military counter-sniper role—out to roughly 1,000 meters—in smaller- to mid-sized weapon systems. It offers exceptional accuracy and superior ballistics over the ubiquitous .308 while dishing out substantially less recoil and enough energy to make it a legitimate contender for military and law enforcement applications.

“I’ve been using prototype CAMGAS barrels, in both .260 and 6.5 Creedmoor, in competition for almost a year with excellent results,” Hamilton explained. “Both rifles ran flawlessly through high-round, fast-cadence stages, firing hundreds of rounds with 100 percent reliability and zero maintenance or cleaning. From recoil to reliability, every aspect of performance was improved compared to the typical un-tuned barrel.”

For more information on PROOF Research, visit

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