I have a few PCCs:
Beretta CX4 Storm 9mm: light, compact, accurate, reliable. Not much available in accessories and stock trigger isn't anything to brag about but as close to an SBR without paperwork as you can get. 30 round factory mags are cheap and reliable.
Just Right carbine .45acp gen. 2: Heavy but accurate, considering the drop rate of a 230 grain slug it's surprisingly tight at 50 yards and beyond. Had to fiddle with my 13 round Glock mags & upgrade springs to get it running reliably, the 9mms do not seem to have this problem. It will run reliably on a 27 round Korean hicap but had to add a Kriss mag spring to get it there.
Rock River Arms 9mm AR (Colt pattern w/Hahn block): The least accurate of the bunch but has never jammed, ever. not once. Runs like a sewing machine and with a heavy buffer eats +P ammo all day, every day.