Faxon Firearms 16in BIG GUNNER 6.5 Grendel Mid-Length 416-R. QPQ Barrel Black Nitride. 5 Grendel Mid-Length 416-R. QPQ Barrel. Faxon Firearms uses 5R rifling to craft these AR15 Barrels which means they contain opposite grooves and reduced sharp angles that decrease jacket formation while upping velocity. Plus it makes the barrels easier to clean. Every Faxon Firearms 16in Nickel Teflon Coated Barrel is treated with Nitride inside and out locking in the bore resisting harmful elements and extending the life of your barrel. Pick up a piece of high quality equipment and install this Faxon Firearms 16in Big Gunner QPQ Rifle Barrel today. Specifications for Faxon Firearms 16in Big Gunner 6.5 Grendel Mid-Length 416-R. QPQ Barrel: Manufacturer: Faxon Firearms Color: Black Nitride Finish: Nitride Fabric/Material: 416R Stainless Steel Caliber: 6.5mm Grendel Barrel Length: 16 in Barrel Profile: Gunner Gas System Length: Mid Length Gas Block Journal Size-Diameter: .750 in Threads per Inch: 5/8x24 Barrel Twist Rate: 1-8 Barrel Material: 416R Stainless Steel Flutes: No Gun Make: AR Platform Gun Model: AR-10 Weight: 1.53 lb Condition: New Gas Block Journal Size-Length: 1.9 in Gun Type: Rifle Barrel Extension Material: Nickel Teflon Coated Rifling Profile: 5R Features of Faxon Firearms 16in Big Gunner 6.5 Grendel Mid-Length 416-R. QPQ Barrel: Gas Block Journal Length: 1.9in M4 Barrel Extension Manufactured 100percent in-house from gun-barrel-quality bar-stock Opposite grooves and reduced sharp angles that reduces jacket deformation increasing velocity and easy cleaning Nitride treated inside and out locking in the bore improving barrel life and keeping the elements at bay Coated in a Nickel Teflon coating that maintains incredible dry lubricity corrosion resistance and tightens up fit between the extension and receiver Magnetic Particle Inspected Recessed Target Crown Package Contents: Faxon Firearms 16in Big Gunner 6.5 Grendel Mid-Length 416-R. QPQ Barrel What firearm models does the manufacturer say Faxon Firearms 16in Big Gunner 6.5 Grendel Mid-Length 416-R. QPQ Barrel is compatible with? The manufacturer says that Faxon Firearms 16in Big Gunner 6.5 Grendel Mid-Length 416-R. QPQ Barrel is compatible with AR-10Faxon Firearms 15BG8M16NGQ-5R-NP3: 16in BIG GUNNER 6.5 Grendel Mid-Length 416-R. QPQ Barrel Black Nitride