Selling my upper build, Geissele 14.5 barrel with their bomb proof gas block assembly on a very rare Knights Armament URX 3.1 handguard with Colt receiver and KAC 3 prong muzzle device. Professionally assembled. No BCG and charging handle. Shot less than 100 rounds through the barrel only. Excellent condition. $900 no trades please. Thanks for looking.
