No I havent driven an unregistered car and lets be honest, there is a huge difference. Why would you carry a unregistered gun period? Unless he just bought and had not registered it yet. But I have never heard of anyone getting arrested for an unregistered gun if they have a LTC and receipt for the gun.
For the record, I never said anything about it being stolen or was used in a homicide.
Any gun owner will tell you there is little reason to be carrying a unregistered gun, unless you are bringing it home because you just bought it. I would be curious to know if he has a LTC in CA.