Faxon Firearms 300 Gunner Rifle Barrel Carbine-Length 4150 QPQ Nitride Black Nitride 16. Faxon Firearms crafted these AR15 Barrels from steel and added a QPQ nitride finish inside and out for enhanced resistance against corrosion and abrasion. These barrels bring the balance of your gun back towards your body resulting in a more comfortable shooting experience for all-day adventures. The Faxon Firearms .300 AAC Blackout Gunner Rifle Barrel is also button-rifled for increased accuracy and guaranteed consistency of bore and groove dimensions. Improve your aim and create a longer-lasting weapon by installing this Faxon Firearms 300 BLK Gunner Profile Rifle Barrel. Specifications for Faxon Firearms 300 Gunner Rifle Barrel: Manufacturer: Faxon Firearms Color: Black Nitride Caliber: .300 AAC Blackout Barrel Profile: Gunner Gas Block Journal Size-Diameter: .750 in Threads per Inch: 5/8x24 Barrel Twist Rate: 1-8 Flutes: No Gun Make: AR Platform Gun Model: AR-15 Condition: New Gas Block Journal Size-Length: 1.9 in Gun Type: Rifle Features of Faxon Firearms 300 Gunner Rifle Barrel: Button rifled M4 barrel extension .300 Blackout for more power - compatible with AR15 components Gunner Profile - hybrid of Government profile in rear and Pencil profile in front. Retains weight at the rear to maximize heat resistance and mitigate whip and removes weight from front of barrel for maximum versatility QPQ Nitride finish for durability and corrosion resistance Gas Block Journal Length 1.9 inches Individually checked for headspace by precision custom hardened gauges Magnetic Particle Inspected 11-degree Target Crown Package Contents: Faxon Firearms 300 Gunner Rifle Barrel What firearm models does the manufacturer say Faxon Firearms 300 Gunner Rifle Barrel is compatible with? The manufacturer suggests that Faxon Firearms 300 Gunner Rifle Barrel is compatible with AR-15Faxon Firearms 15A38C16NGQ: 300 Gunner Rifle Barrel Carbine-Length 4150 QPQ Nitride Black Nitride 16