All this matters zero. All the government has to do is make it law that everyone has to have a national I.D. Don't do what they want??? They shut down your I.D. You can't buy or sell without scanning your I.D. Your guns won't amount to a hill of beans.
I think that is a more realistic possibility than a ban.
Through mandatory licensing, the govt can control what people are 'legally' allowed to do.
If a mandatory license gets put into place, then a lot of law abiding gun owners will technically be criminals.