Save you some time - Tiger Rock 16in Length Barrel AR 9mm Complete Upper Receiver

I recently purchased the 16 inch 9 mm upper from Tiger rock It was extremely disappointed with the product When I first looked at it, the Coating was Horrible the inside of the barrel still had Milling marks between the rifling I also thought the upper receiver was an ar-15 platform and I was under the assumption it was an ar-9 since it was referred to as ar-9 in the description I should have looked better at the picture, the rail did not line up tight. Even with the 42% discounted price of $420 it’s not worth it