Andro Corp 18 in SPR 223 Wylde SLR 16.5 Complete Upper A2 Flash Hider 1/2-28 Threaded Muzzle SPR 223 Wylde Chamber by Ballistic Advantage (Special Purpose Rifle) 416 Stainless Steel 1/8 Twist Six Groove 1/2-28 Threaded Muzzle Pinned .750 Nitrite Gas Block Rifle Length Gas System 41 Ounces Bead Blast Finish Nib Coated Extended M4 Feed Ramp Extension HP and MPI Tested SLR Rifleworks 16.5 in Solo Forearm M-Lok Dry Film Lubed Upper w/ T-Markings Forward Assist & Ejection Port Assembly BCMGUNFIGHTER Charging Handle (5.56mm/.223) w/ Mod 4 (MEDIUM) Latch WMD NiB-X M16/ AR15 Bolt Carrier Group NiB-X M16/AR-15 Full Auto Bolt Carrier Group – POLISHED All WMD BCG components are manufactured by Defense Industrial Base suppliers to WMD’s exacting specifications to provide the best BCG available. Specifically engineered for NiB-X nickel boron coating to provide long life, high reliability and easy cleaning and maintenance. The BCG components are coated and polished to reduce fouling adherence. Coating is guaranteed for life against chipping, spalling or flaking. Over 30K rounds in Government protocol endurance testing did not wear the coating off. Especially beneficial in short barrel setups and suppressed platforms. Troy Sights are not included. $525 Shipped in the lower 48 States where legal.