Complete .556 Upper. 18" Green Mountain Stainless, Fluted Barrel. Anderson Reciever with Forward Assist and Dust Cover. Complete BCG. JP Adjustable Gas Block. 15" M-Loc handguard with full top rail and 3 inch front bottom rail. Stainless Compensator. Barrel is a tack driver with less than 200 rounds thru it. Scope is a Vortex Viper on a Warne one-;piece mount. Its a 1-4 Illuminated. $750 Cash or Trade for Colt 1911 in 45 ACP, .38 Super or 10mm. No junk. Will not separate at this time.