There are two extreme viewpoints at work, concerning the Second Amendment (since the collective right only argument was shot down by SCOTUS).
One end is that any restriction or regulation about firearms, of any kind, by anyone, anywhere is infringement, and therefore, unconstitutional.
(I kind of favor that approach, personally)
At the other end of the spectrum are those who feel that as long as you can buy some kind of gun, somehow, after passing all the govt requirements about your character and personal history, and the time it takes for them to decide to approve you, then your rights are not being infringed upon.
If the Second Amendment said "the right to keep and bear any man portable arm, open or concealed with no legal restriction of any kind, by any one, any where, and we really, really mean it..." we wouldn't have the issue to argue about.
It doesn't say that. It says something more vague, and while WE believe we have a clear understanding, so does the other side, and its the opposite of ours.
The SCOTUS ruling in
Heller did affirm our right to ownership, and complete prohibition of entire classes of arms was unconstitutional, but left us with the legal ruling that "reasonable restrictions" ARE allowed as constitutional (until/unless another Supreme court reexamines the issue).
And, typically, the Court did not specifically define what "reasonable restrictions" are. SO, in that matter, we are still back at square one, what we see as unreasonable restriction (infringement) the other side sees as entirely reasonable, and a "good first step"....
Personally, I have no problem with returning to the gun control laws of umm, say, the 1820s (which is NONE). If you shot someone because you felt like it, for fun or profit, after a fair trial, you were decently hung.
But then, I'm not a millionaire or billionaire with paid professionals for personal security...