Proof Research AR10 Creedmoor Barrel Features The Proof Research AR10 Creedmoor Barrel is machined from Stainless Steel a material prized for its accuracy potential and consistent harmonics across a long string of fire. Its 1:7.5 twist rate is matched specifically to the heavier higher ballistic coefficient bullets common in 6.5 Creedmoor loadings stabilizing them properly for consistent long range accuracy. Five grooves in the rifling help balance bullet stabilization with reduced fouling keeping accuracy consistent between cleanings. The .875 diameter keeps the barrel s profile trim while still providing enough mass to resist heat induced accuracy loss during extended range sessions. At 18 long with a Rifle +1 Length barrel type this barrel is built to maximize velocity from the 6.5 Creedmoor cartridge while keeping the AR10 platform balanced and maneuverable. The 5/8x24 thread pattern is a standard fit for 6.5mm caliber suppressors and muzzle brakes giving shooters flexibility in how they configure their rifle s muzzle. Proof Research is known for precision barrel manufacturing built around tight tolerances and repeatable accuracy. This Standard profile barrel is available for sale at GrabAGun for shooters upgrading an AR10 rifle for serious long range precision work. Proof Research AR10 Creedmoor Barrel Specifications Manufacturer: Proof Research Model: AR10 Creedmoor Barrel Caliber: 6.5 Creedmoor Compatible Hosts: AR10 Barrel Material: Stainless Steel Barrel Type: Rifle +1 Length Twist Rate: 1:7.5 Diameter: .875 Grooves: 5 Thread Pattern: 5/8x24 Barrel Description: Standard Barrel Length: 18 Available At: GrabAGun