Faxon Firearms .308 Winchester Big Gunner Rifle Barrel Rifle-Length 4150 QPQ Nitride Black Nitride 18. 308 WIN Big Gunner Rifle Barrel delivers unparalleled performance on duty or at competitions. One of the standout features of these AR15 Barrels made by Faxon Firearms is the medium taper located behind the gas block. Past the gas block journal on this Faxon Firearms .308 WIN Big Gunner Tactical Rifle Barrel you'll notice a thinner taper. This intentional design reduces weight while maintaining optimal ruggedness which allows for high rates of fire. These button rifled barrels are crafted from 4150 QPQ and contain a salt bath nitride finish inside and out ensuring corrosion resistance and enhanced durability. Step up the quality of your rifle by installing this Faxon Firearms .308 WIN Rifle-Length Barrel. Specifications for Faxon Firearms .308 Winchester Big Gunner AR-10 Rifle Barrel: Manufacturer: Faxon Firearms Color: Black Nitride Finish: Nitride Fabric/Material: 4150 CMV Steel Caliber: .308 Winchester Barrel Profile: Big Gunner Gas Block Journal Size-Diameter: .750 in Threads per Inch: 5/8x24 Barrel Twist Rate: 1-10 Barrel Material: 4150 Chrome Moly Vanadium Flutes: No Gun Make: AR Platform Gun Model: AR-15 Condition: New Gas Block Journal Size-Length: 1.9 in Features: Medium-taper behind the gas block The gas block journal is set to .750in for compatibility with most common gas blocks and 1.9in in length for long blocks or aftermarket piston kits Barrel Material: 4150 QPQ Barrel Type: Button Rifled Inside Finish: Salt Bath Nitride Outside Finish: Salt Bath Nitride Muzzle Thread: 5/8-24 TPI 11-degree Target Crown Package Contents: Faxon Firearms .308 Winchester Big Gunner Rifle Barrel What firearm models does the manufacturer say Faxon Firearms .308 Winchester Big Gunner AR-10 Rifle Barrel is compatible with? The manufacturer says that Faxon Firearms .308 Winchester Big Gunner AR-10 Rifle Barrel is compatible with AR-15Faxon Firearms 10A810R18NGQ: .308 Winchester Big Gunner Rifle Barrel Rifle-Length 4150 QPQ Nitride Black Nitride 18