Interesting interactive map at iSideWith that purports to depict regions of the country color coded by support (or loathing) of gun control.
Couple of large grains of salt with which to digest this map: the provenance of the site is unknown to me. And the political affinity of those that visit could dramatically skew results. In this case, my guess is that this map understates support for gun rights.
Hat tip: BadBlue Gun News.