The 2nd Amendment, or any other, could be repealed, just as Prohibition was made a constitutional amendment, then later repealed. It's hart to add or eliminate from the Constitution, by design, but it's possible.

I'd say the BLM/Antifa/DNC violence this year has made that very unlikely to happen for at least a decade, though. Remind people WHY they need to keep the right to keep and bear arms.....the Dem. shock troops just did that for the whole country. Consider that some, if not most of those 5M new American gun owners are probably liberals who got scared by seeing liberal violence up close.