Nothing in the ARS against it, as far as I know.Originally Posted by ARS 13-3102
The quote is pertinent if he is under 21. Under ARS 13-3102 Subsection B, paragraph 3, which describes in what manner us youngans can open carry, it seems perfectly fine to carry a weapon slinged and out of a holster or case, provided it's visible.
I know we aren't supposed to discuss the open carry of long guns, but that is legal in AZ as well.
For more information, I suggest reading ARS 13-3102