As was mentioned, it is the law in Arizona that you must have at least one fully functional Colt Single Action Army, and it must be in a caliber beginning with "4." You will have a 30-day grace period from date of entry to find and buy one, or you will be subject to a hefty fine and possible jail time. And in Maricopa County, you will be asked for personal identification proving your citizenship if you are found not to own one! 
Here's mine:
Oh, and one other thing: You don't need any sort of license to wear it openly or concealed! "Licenses? We don't need no stinkin' licenses!"

Here's mine:

Oh, and one other thing: You don't need any sort of license to wear it openly or concealed! "Licenses? We don't need no stinkin' licenses!"