Trem.
I have a full shred in the bridge of my Charvel DK24FR, and I'm really not loving it. Much too polite for my liking, it has a smoothness that I can't dial out. Might swap it for a JB, a pup I had zero interest in until I was gifted a Jackson Dinky with a JB in the bridge and I was in tone heaven.
Mine is trans coloured as well. The solid ones are alder or Basswood, I forgot which one.