6mm ARC AR15 Barrel and BCGSelling some parts from an AR15 upper receiver project that has been put on indefinite hiatus. These parts are brand new and still in their original packaging. Text me if interested. Asking $250 for the lot.-Rexus Ultra BCG works with 6.5 Grendel, 6mm ARC or 22 ARC- Rexus 6mm ARC 16 Barrel. See below for info as per the official website.Our Rexus line of premium 41V50 chrome-moly-vanadium steel in a medium-light field profile for all-day carryWeight: 2 lb 0.4 ozBlack Nitrided inside and out and barrel extension has M4-style feed rampsMid-length gas system (MLGS); gas block diameter 0.750"SAAMI-spec chamber; headspaced for Mk136, also called Type 2, AR15-style bolts with a boltface depth of 0.136 inches, extended freebore allows seating to 2.280Button-rifled. Hybrid 5R 1:7 rifling with our unique 5R-EE (Easy Engraving) reduced-height rifling for decreased bullet deformation"Bull" chamber section reduces barrel whip for consistent accuracy while being closer to gun's center of balance for easier handling; also puts a good chunk of protective steel closest to the operator, where it counts in the event of an overchargeFeatures our industry-first Dog-Point Dimple System (DPDS) for simple, smart and secure gas block installation (gas block and screws NOT included)Muzzle threads 5/8x24 with 11-degree target crown"Rexus Victor, Conquering King" logo near muzzle