Chinese junk!

I should have known better than to buy this kit. Dust cover that came with parts kit was for Ar-10 (too long). The handguard/rail is impossible to time correctly, there are no shims and the handguard feels flimsy/wobbly even with the set screw tightened all the way down. Upper receiver had burrs in the gas tube hole (made for a real tight fit). And worst of all, upper receiver wont fit on my DPMS, Adcor defense, or PSA lower. It does however fit BARELY on my Spikes lower, but the pivot and takedown pin have to be hammered out. I wouldn't touch this kit again even if it was on sale for $100, total junk!