From my understanding from Bung, GT made some without FEG rcvrs during a shortage.
Current runs have been again FEG rcvrs and the polish bbl.
I just bought a used 85C this week. I have not shot it. I knew the original owner and he had taken good care of the rifle and shot a deer with it. I trust his opinion that the rifle is true.
I am more than happy with the one I own, which I bought new a year ago. It was surprisingly accurate.
There was a post where Campy's friend (forget the board name) just bought a 85B and the barrel was misaligned/inserted into the rcvr.
I think at this point if you are interested in any GT rifle to inspect it throughly before purchase. Be especially aware of the front site post and the barrel fitting.