Let's get to the end game. What should the Constitution say, if anything, about guns and what power should the Federal government have to regulate them?
We already know what the Constitution says about the matter, you’ll find it in
Heller/McDonald and its subsequent case law.
The Second Amendment codifies an individual right to possess a firearm pursuant to lawful self-defense.
Although the Second Amendment right is fundamental, it is not ‘unlimited’ – it is subject to regulation and restrictions by government through the pollical process, reflecting the will of the people, as decided by the people.
And when the people err, and enact measures repugnant to the Constitution, those adversely affected are at liberty to seek relief in the courts through the judicial process.
So again: there’s no need to ‘repeal,’ ‘replace,’ or ‘rewrite’ the Second Amendment, or any other like nonsense.
We need only allow the political and judicial process to continue to function as the Framers’ intended, allow Second Amendment jurisprudence to continue to evolve until we have a comprehensive understanding of what firearm regulatory measures are appropriate and Constitutional, and what firearm regulatory measures are not.