I'm admittedly unsophisticated when it comes to the criminal possession of handguns by felons. But if you're carrying three handguns in your vehicle, why make one of them a "ghost gun" (e.g., one made of polymer and that doesn't contain a serial number)?
I can see why someone might want a ghost gun; that way, it can't be traced. But if the other two guns that you're carrying can be traced, doesn't that somewhat defeat the purpose of the third weapon?
I guess you could be selling the guns or something like that. Personally, though, I'd just stick to carrying either (1) regular old handguns, or (2) ghost guns. No mix-and-match.