All my firearms are currently legal. If Kennedy gets his ammo "performance standards" change for his "armor piering" definition, almost everything I have become instantly illegal.
What then smart ass?
Look, if you think it's time to go challenge The Man over new full-auto weapons, that have been illegal for almost 25 years, go for it.
"What then", in your hypothetical case, will have to be determined at the time. It shouldn't be discussed here, and can't under the FR Terms of Use.