Great upper, but be prepared to do some prep work. - ABC RIFLE COMPANY AR-15 Sleek Billet Stripped Upper Receiver

I ordered two of these, one sniper grey and one burnt bronze. I started with the dust cover. I oiled up the hinge pin and fitment was unusually tight, so tight I had to use my tiny AR pin hammer to tap it in. Same thing with the forward assist, I was thinking the roll pin was just a tad large, it took some serious blows to drive it in. The WTF moment came when I went to slide it on my midwest upper receiver rod for barrel assembly. The farther on it went, effort increased to the point I was using a rubber mallet. I stopped maybe 2 inches short of where the barrel chamber engages as i was concerned about getting it off the rod.When i went to insert the barrel (ballistics advantage) it wouldn't even begin to go in. At this point i broke out the dremel and wire wheel to remove the cerakote in the whole, an there was plenty of it! I had to use the barrel nut to pull it into the fully seated position, its that tight! I've used this same upper sold by other companies, none were like this. When I tapped it off the receiver rod (3lb hammer and old nylon foregrip) it actually wore the anodizing off the rod in places. I've came to the conclusion that the cerakote was applied way to thick. I suspect that tomorrow i will be removing cerakote from both front and rear pin holes, and check the BCG fitment. Outside of the cerakote being about .002 too thick everywhere it's great. If ABC machined this, its on them, but I doubt that since it's every feature. We'll see how the Bronze one goes.