Rocky, I love mine.......just in case you haven't already, better get some extra mags for it. They will try to regulate them as well.
As for a universal background it's one of the reasons I got a concealed carry permit.
What ya thinking on optics or are you staying with the iron?
I got a night-force for my going blind ass.
As for .223 I'm more of a 5.56 guy. Been looking at the Sig Rattler in that instead of the 300 blackout.