Faxon's Match Series of barrels takes our renowned performance and value up a notch.Manufactured in-house from gun-barrel-quality bar-stock, the Match Series starts with 416-R in 5R rifling. 5R is a hybrid rifling, with lands opposite grooves and reduced sharp angles that reduces jacket deformation increasing velocity and easy cleaning.The extension is coated in a Nickel Teflon coating that maintains incredible dry lubricity, corrosion resistance, and with the coating, tightens up fit between the extension and receiver - again improving upon accuracy. Combined, the Match Series of barrels are ready for when duty calls or the buzzer beeps with unrivaled performance value.Specifications: Barrel Material: 416-R Barrel Type: 5R Button Rifled Honed and Lapped Barrel Caliber: 6.5 Grendel Type II Barrel Twist: 1:8 Barrel Length: 18" Barrel Profile: Target Barrel Gas System: Mid Outside Finish: Bead Blast Muzzle Thread:5/8x24 Gas Block Diameter: .750" Gas Block Journal Length: 1.1" Barrel Extension: M4, Nickel Teflon Coated Weight: 1.81 lbs Magnetic Particle Inspected Recessed Target Crown