[pmlamotte]

It's not necessarily rewriting the constitution, and could take decades, but ensuring liberal judges get a majority on the supreme court is all it really takes in order to reverse the 5-4 D.C. v. Heller (2008) decision that first affirmed the 2nd amendment grants individuals the right to handguns for private use outside a militia. It's congressional legislation from there. Roe v. Wade already showed it's possible to overturn an opinion that grants individual rights.

[umanwizard]

Indeed, you’re right. The Supreme Court is the only remotely plausible way policy on gun control, or any other cultural hot-button issue, can ever change in the US.

However, given the present composition of the Supreme Court, it’s reasonable to assume that they will not do anything meaningful on this subject for decades, at least.