I suppose he can try, but there is no way he will get that done.
What do you mean 'RE- register' anyway. Unless you live in Ny or some place like Ny none of your guns are registered in the first place.
I live in NH and not one gun of mine is registered or ever has been registered, much less will ever be registered.
If the thinking is the 4473 form to pass NICS, NICS doesn't get make, model and serial number, just the FFL does and he is the only one who knows what make model and serial number went too.
NICS knows you bought a long gun, and hand gun (revolver) or pistol (semi auto) and any combinations of the above terms..
So this is like if i said i bought a pistol last week now guess what it was?
How I KNOW this is I have been a gun store clerk. I have made many NICS calls in my past.