Fit great - made in usa - UTG Pro AR15 Carbine Length Drop-in Quad Rail

I put this quad rail on my FNH FN15 carbine, it fit perfect and went on easily. It feels solid and I couldn't find any flaws in the finish. I only put a light and a forend grip on so I can't say how well it is suited for sights, but I don't see any reason why it wouldn't work. I put a little blue locktite on the threads of the screws and it is holding fine. It came with extra screws which was nice in case I ever do have one fall out. Overall it suited my need perfectly and was at a very reasonable price.