You say that as if it's a bad thing.... is not the same as a neighbor having an AR 15 or two in a subdivision.
Only reason I don't have an AR-15 or two is $$$ and it wouldn't work well as my concealed carry gun. ;-)
For all our TX gun culture, AZ must be recognized for trumping TX. They don't even need a CHL, and they allow open-carry (at least that's my understanding of AZ law).