Faxon Firearms AR-10 Barrel Features The Faxon Firearms AR-10 Barrel is machined from triple stress-relieved 416-R stainless steel in a heavy fluted profile cutting weight from the muzzle end while the flutes add rigidity and help the barrel dissipate heat during sustained strings of fire. A 5R button rifled bore with a 1:8 twist rate stabilizes 6.5 Creedmoor bullets for accuracy at distance and because 5R rifling offsets the lands over the grooves rather than stacking them directly across the bullet suffers less distortion on its way down the bore and the bore itself cleans up more easily afterward. An 11 degree target crown protects the critical muzzle edge from dings and promotes even bullet exit for repeatable accuracy. At 2.75 lbs and 22 inches long the barrel is sized for a rifle length gas system with a .750 inch gas block diameter. Faxon finishes this barrel black with a QPQ salt bath nitride treatment applied both inside and out giving the bore and exterior added corrosion resistance and a hard wearing surface for long-term use. The barrel extension is coated in nickel teflon for an additional layer of protection and smoother cycling against the bolt carrier group. Threaded 5/8x24 at the muzzle the barrel is ready to accept a brake compensator or flash suppressor without further gunsmithing. Every barrel passes magnetic particle inspection to catch hidden flaws before it ships giving AR-10 pattern rifle builders a precision-tested upgrade for sale at GrabAGun. Faxon Firearms AR-10 Barrel Specifications Manufacturer: Faxon Firearms Model: AR-10 Barrel Caliber: 6.5 Creedmoor Barrel Length: 22 Barrel Material: 416-R Stainless Steel Barrel Profile: Heavy Fluted Twist Rate: 1:8 Rifling: 5R Button Rifled Gas System: Rifle Length Gas Block Diameter: .750 Muzzle Thread: 5/8x24 Color: Black Finish: QPQ Nitride Weight: 2.75 lbs Compatibility: AR-10/DPMS LR-308 Pattern Available At: GrabAGun