Barrel nut poor dezine - JL Billet AR 15 Lightweight Billet Upper Receiver

it is pricey for the upper and lower, everything from jb billet is the worse thing is there barrel nut that you get with the hand guard,it is a real trick trying to get it tight with out stripping it out , thier is not much information on it, i mess up 3 of them .i had to make a custom wrench to make it work. it is good workmanship i give that to them but prices are high