[Tupelo]

In Arizona, if you buy a gun from a licensed FFL at a gun show, you must be an Arizona resident and undergo a background check. Unless you have a CCW license because they have already undergone an even more stringent background check.
You can buy guns from non FFL holders, who are selling personally owned firearms without a background check.
I think this is pretty much the standard in the Free States with maybe the exception of the CCW exemption.
Hope that helps.

[Patriot365]

This is the exact same way that it is in Texas. Gun Show loop hole is bunk!