Faxon Firearms .308 Winchester Pencil Rifle Barrel Rifle-Length 4150 QPQ Nitride Black Nitride 18. 308 WIN Pencil Rifle Barrel is a premium upgrade for your firearm. Each of these AR15 Barrels by Faxon Firearms are nitride treated inside and out for superior corrosion resistance against harsh elements. This Faxon Firearms .308 WIN Mid-Length Pencil Barrel is fully stress relieved and air-gauge tested and utilize an 11-degree target crown that greatly increases your accuracy at the range. Land more shots on target by upgrading to this Faxon Firearms .308 WIN 4150 Pencil Rifle Barrel. Specifications for Faxon Firearms .308 Winchester Pencil Rifle Barrel: Manufacturer: Faxon Firearms Color: Black Nitride Finish: Nitride Fabric/Material: 4150 Steel Caliber: .308 Winchester Barrel Profile: Pencil 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: 1.1 in Gun Type: Rifle Features of Faxon Firearms .308 Winchester Pencil Rifle Barrel: Barrel Material: 4150 CMV Barrel Caliber: .308 WIN Barrel Twist: 1:10 Barrel Profile: Pencil Inside Finish: Salt Bath Nitride Outside Finish: Salt Bath Nitride Muzzle Thread: 5/8-24 TPI Barrel Extension: LR-308 (DPMS Compatible) Magnetic Particle Inspected 11-degree Target Crown Package Contents: Faxon Firearms .308 Winchester Pencil Rifle Barrel What firearm models does the manufacturer say Faxon Firearms .308 Winchester Pencil Rifle Barrel is compatible with? The manufacturer says that Faxon Firearms .308 Winchester Pencil Rifle Barrel is compatible with AR-15Faxon Firearms 10A810R18NPQ: .308 Winchester Pencil Rifle Barrel Rifle-Length 4150 QPQ Nitride Black Nitride 18