Well,it came yesterday. It looks ok,nice fit and finnish,my bolt and carrier works smoothly in it. The only problem is where the tang fits into the lower at the rear.The tang is 0.011" bigger than the slot in the lower so some carefull file work will be reqd. It may be that the oly slot is out of spec too,so I will check to see how my other upper fits in it before working on the upper.