Proof Research AR-10/LR-308 6.5 Creedmoor CAMGAS Barrel w/ Gas Tube, 1:8 Twist Stainless Steel

The Proof Research AR-10/LR-308 6.5 Creedmoor CAMGAS barrel with gas tube is purpose-built for shooters who demand precision at distance. This 20-inch stainless steel barrel pairs the proven 1:8 twist rate of 6.5 Creedmoor with Proof's CAMGAS system—designed to deliver consistent function and predictable accuracy whether you're dialing in at the range or hunting big game. The included gas tube and rifle-length gas system (plus 2) means reliable cycling and easy maintenance, while the 5/8-24 muzzle threads accept virtually any suppressor or muzzle brake in your collection.

Building a precision AR-10 platform comes down to foundation—and a quality barrel is where it starts. The 6.5 Creedmoor has earned its reputation for flat trajectory, wind resistance, and terminal performance on everything from deer to elk, and this Proof barrel gives you the mechanical accuracy to make those ballistics count. At 3 lbs 1 oz, it's substantial enough to manage recoil and vibration without turning your rifle into a clubhouse special. The .875-inch gas journal keeps things tight and repeatable, shot after shot.

Proof Research barrels are machined to tight tolerances and stress-relieved to stay true over time. If you're swapping uppers, building from scratch, or upgrading an existing AR-10 platform, this barrel delivers the precision foundation serious shooters expect.

Key Features

• 20-inch stainless steel barrel with 1:8 twist optimized for 6.5 Creedmoor performance
• CAMGAS system with included gas tube for reliable, predictable function
• Rifle-length gas system (+2) balances reliability and impulse control
• 5/8-24 muzzle threads compatible with standard suppressors and muzzle devices
• Stress-relieved construction for consistent long-term accuracy
• 3 lbs 1 oz weight—substantial enough for precision shooting without excess bulk

Specifications

Frequently Asked Questions

Will this barrel work on my AR-10 or LR-308?

Yes. This barrel is designed for standard AR-10 and LR-308 platforms and includes a gas tube sized for a rifle-length system (+2). Verify that your upper receiver and bolt carrier are 6.5 Creedmoor-compatible before installation.

What muzzle devices can I attach?

The 5/8-24 muzzle threads accept any 5/8-24 suppressor, brake, or flash hider. This is the standard thread pitch for 6.5 Creedmoor and larger-caliber rifles, giving you flexibility to add suppressors or match your preferred muzzle solution.

What is included in this package?

The barrel ships with the gas tube as noted in the product name. Confirm fitment to your specific receiver and bolt before installation.

Is 1:8 twist the right choice for 6.5 Creedmoor?

Yes. A 1:8 twist stabilizes standard and heavier 6.5 Creedmoor match ammunition reliably, making it a solid choice for both hunting and long-range target shooting.