Honestly it doesn’t really matter. The second amendment does exist, so some arms in the hands of the populace will be allowed unless we amend our constitution.

That said, we can draw lines based around what kinds of weapons. And something like a bolt action rifle or pump shotgun can be excellent for hunting, but very difficult to conceal or commit any kind of mass shooting with.

It’s semi-autos that are specifically capable of high rates of fire and quick reloads, and that become dangerous. We can regulate some of those arms the same way we regulate access to tanks, jets, nukes and chemical/biological arms.