Okay, Problem 1: Ejector spring bracket edge is not flush with the barrel. It extended outward too much to the point that when the extractor would pull the shell out, it would catch on the ejector bracket edge. FIX: File that edge down! It worked...
Problem 2: Inside of the chamber was too roughly finished. After I fired a high brass Federal slug, the chamber gripped onto the shell too tight to let go. I had to wait for the gun to cool before I could slam it open. I had a friend take a flap sander bit to the inside to smooth it out. The shotgun performs wonderfully now!
My reference to the paint wear. I'll probably end up polishing it. I'll post some photos if I go through with it.
A little skeet shooting told me that there's an issue with this Fab Defense PR-870 fore grip. With the recoil, my thumb jammed into the picatiny rail on the left side... I'll be removing that rail obviously. Flashlight will be placed on the right side. The only downside to that is I will not be able to actuate the flashlight toggle with my thumb.
The fore grip held up great through about 200 shells. I would recommend it to a friend.
The ghost ring sights worked awesome for skeet shooting. Super fast and easy to find the skeet as soon as I'd shoulder the gun.