Gun control is about YOU controlling YOUR guns
If you are going to be literal about the 2nd amendment then you can have the "arms" available at the time it was written
"Arms" are tangible items, quite specific at the time of the article, not an abstract with no tangibles, like Liberty, which means the same thing, then and now
So saying there is no limit is simply not true, it is debatable, but on its face, literally, "arms" would be what was available at the time the 2nd amendment was ratified
But moot point now
Limits on what should be available for legal purchase should come down to what type of weapon do you want your "crazy" neighbor to have
Humans do crazy, always have always will, and its often not crazy to them, they have a reason, not one that makes ANY SENSE to anyone else but that's because they are "crazy"
Las Vegas shooter became an illegal gun owner after his first shot that hit another human being on purpose
And WE gave him those guns, assuming all were legally purchased
So what kind of weapons do you want the next "crazy" one to have, it really is up to you
That is what the Laws are for, for US(voters) to decide what kind of weapons we want "crazy" people to have, and also criminals as an after thought
Laws are not done to take away Freedom, they are done make Freedom better, and you get to decide by who you vote for