Faxon Firearms AR-10 Barrel Features The Faxon Firearms AR-10 Barrel is machined from triple stress-relieved 416R stainless steel and put through Magnetic Particle Inspection to ensure it is free of hidden flaws that could compromise accuracy or service life. Straight flutes cut into the exterior reduce weight while actually adding stiffness to the barrel and they provide enhanced cooling to resist heat-induced distortion during strings of fire. The 1:8 twist rate paired with 5R button rifling imparts excellent stability to 6.5 Creedmoor bullets and because 5R rifling offsets lands over grooves rather than directly opposite them the bullet is distorted less as it travels down the bore. This rifle length gas system barrel uses a .750 gas block diameter matching standard AR-10 pattern gas blocks. The matte black QPQ nitride coating protects the exterior and bore from corrosion while the NP3-coated barrel extension adds a slick low-friction surface at the critical bolt interface. An 11 degree target crown protects the rifling at the muzzle and promotes consistent bullet exit for improved accuracy. The 5/8x24 threaded muzzle is ready to accept a brake compensator flash suppressor or suppressor without any additional machining. At 2.52 pounds this heavy fluted barrel gives AR-10 builders a durable accuracy-focused upgrade for long-range 6.5 Creedmoor shooting for sale at GrabAGun. Faxon Firearms AR-10 Barrel Specifications Manufacturer: Faxon Firearms Model: AR-10 Barrel Caliber: 6.5 Creedmoor Barrel Length: 20 Barrel Contour: Heavy Fluted Twist Rate: 1:8 Rifling: 5R Barrel Finish: QPQ Nitride Color: Black Crown: 11 Degree Target Crown Gas System Length: Rifle Gas Block Diameter: 0.750 Muzzle Threads: 5/8x24 Compatible Hosts: AR-10 Weight: 2.52 lbs Available At: GrabAGun