We torque our barrel nuts 40-80 lbs onto our uppers, giving no chance of loosening while you shoot. Our Barrel nuts are cut from bar stock carpenter 4140 steel and milled out, giving you a better than mil-spec hold for your barrel extension. Our pistol barrels are more accurate than you would think, shooting very accurately at 100 yards! By not lining our barrels with Chrome, we can keep our smooth bore intact as we do the Nitriding process. Chrome, molybdenum, and vanadium are impurities added to the barrels that react positively with the nitriding process with less imperfections and a smoother finish. 223) 10.5” Pistol nitride barrels are 4150 Chrome Moly Vanadium (ChMV). AR-308 LR-308 Handguards and Rail Systems.AR 308/6.8/300 Blackout Muzzle Brakes & Flash Hiders.

KeyMod Handguard Accessories and Attachments.M-LOK Handguard Accessories and Attachments.AR-15 KeyMod Handguards and KeyMod Forends.AR-15 Free Floating Handguards and Rail Systems.AR-15 6.5 Grendel Complete Upper Receivers.

10 inch quad rail 10.5 inch barrell