I missed that, the matte, then dust, then gloss. It's your gun, so go with what you want. I like the differing shades of finish. So I would continue with a gloss feedneck replacement. One good thing is that the parts out of stock are annoying, but it also means they are popular. And in today's paintball, popular generally means they are also good.
With that, I would dub this gun the Shadow pneu-mag. Cause shadows always never just one shade.