There have been some PCRs showing up with black, non-serrated triggers, but I think someone mentioned they were mainly seeing those in the 10rd PCRs? To the best of my knowledge, most ship with the silver serrated trigger.
I carry mine and I love it; no reservations and recommend it highly. Only complaint is I think the stock sights are garbage, but since I'm 15 minutes from CZ Custom, one of these days I'll go down there and get some replacements. I also swapped out the rubber grips for some G10 grips from VZ (people also like Lok and Pachmayr), so if you're considering replacing the stock grips with something a bit thinner and not as grippy, that's an option. Happy shooting!