Okay, so here's what i don't get:

The pro-gun position is "guns don't kill people, people kill people" ... so let's tackle just the "people" side of things:

If the solution is preventing people with criminal or mental issues from obtaining guns (as opposed to getting rid of guns themselves), how does that happen without checking those person's backgrounds?

And since you don't know beforehand who those people are, how can you identify just those people without running a check on every person wishing to buy a gun?

In short: how do we prevent the "bad guys" from having guns without a check of some sort?