Quality is imbued into Faxon barrels from the start, and the Faxon AR-15 22mm ARC 1 in7" Twist 20" Flamed Fluted Rifle Barrel confirms that. Manufactured in-house by Faxon 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. Chambered for 22 ARC, a high performance cartridge that the 5R rifling takes full advantage of. Each barrel is also fully and individually MPI tested for your safety. After rigorous testing, the barrels are Nitride treated inside and out, locking in the bore, improving barrel life, and keeping the elements at bay. The extension is coated in Nickel Teflon which 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 whe...