I live in California, where it's illegal to have a magazine that can hold more than 10 bullets (a standard Glock 17 holds 15+1). It's also de-facto illegal to own an AR-15, since you have to neuter the gun in all sorts of crazy ways for it to be "California legal". You also can't buy any recent (recent meaning, in the last several YEARS) handguns due to the also-obviously-illegal-yet-still-a-thing CA handgun roster.
You're right that nobody is seriously talking about rewriting the constitution; rather, states and other actors are just outright passing laws that blatantly disregard the second amendment. So it's actually worse than that. It'd be better if they were honestly just trying to remove the second amendment from the constitution rather than just de-facto abolish it through ridiculous measures.