Faxon Firearms AR-10 Big Gunner Barrel Features The Faxon Firearms AR-10 Big Gunner Barrel takes the proven 5.56 Gunner profile and scales it up for the larger 6.5 Creedmoor cartridge giving shooters the big brother to Faxon s famous Gunner line. A medium taper sits behind the gas block to add strength where the barrel needs it most while a thinner taper ahead of the gas block trims unnecessary weight for a more balanced rifle. The 5R button rifling and 1:8 twist rate are matched specifically to stabilize longer heavier 6.5 Creedmoor bullets at extended ranges. A polished magnetic particle inspected 11-degree target crown finishes the muzzle end to help preserve accuracy shot after shot. Machined from 416-R stainless steel the barrel is treated with a salt bath nitride finish inside and out for corrosion resistance and smooth consistent cycling. The gas block journal is set to .750 inches and extends 1.9 inches giving shooters room to run long gas blocks or aftermarket piston conversion kits without interference. A nickel teflon coated DPMS LR-308 compatible barrel extension ensures reliable fitment on common AR-10 platform builds. The muzzle is threaded 5/8x24 making it ready to accept a muzzle device or suppressor for shooters building out a long-range or suppressed precision rifle. Faxon Firearms AR-10 Big Gunner Barrel Specifications Manufacturer: Faxon Firearms Model: AR-10 Big Gunner Barrel Caliber: 6.5 Creedmoor Barrel Length: 18 Barrel Profile: Big Gunner Barrel Material: 416-R Stainless Steel Barrel Type: 5R Button Rifled Twist Rate: 1:8 Gas System: Rifle Length Gas Block Diameter: .750 Gas Block Journal Length: 1.9 Inside Finish: Salt Bath Nitride Outside Finish: Salt Bath Nitride Muzzle Thread: 5/8x24 Barrel Extension: DPMS LR-308 Compatible Nickel Teflon Coated Compatible Hosts: AR-10 / LR-308 Platform Weight: 2.46 lbs Available At: GrabAGun