I recall reading about how when the original mass buy back and destruction took place, all sorts of rare and unique firearms were turned in and that police officers charged with the responsibility of cutting them up and melting them down were upset in a good number of instances over the destruction of such firearms.
The government cannot buy "back" that which it did not own in the first place!
What we're really talking about here is armed robbery by government edict.
That’s as evil and sickening as destruction of confederate monuments. Responsible politicians should be hung.