I was surprised to read "6" instead of "4".
Vermont has very few gun laws and has never required a permit to carry concealed and does not issue them.
Alaska and Arizona have relatively recently changed their gun laws so that a concealed carry permit is no longer required. Permits are still issued so that residents can take advantage of reciprocity laws in other states.
Wyoming only recently changed their law so that permits are no longer required but I believe it only applies to Wyoming residents.
The linked article mentions a "majority of Montana" but I am unaware of what their laws are.
That still leaves a sixth state. I have no idea to what the article may be referring.
Posts 10 and 14 have that information - thanks.
Arkansas changed their law and the leftist power structure their is slowly acknowledging it.