They are unregulated in AZ.
I still carry a TASER with me. I rarely carry it on my person, but I have one in my truck at all times in a clip-on leather holster I had made.
They are the greatest thing since sliced bread for officers snd civilians.
Their use has ended a LOT of situations that otherwise would have turned into a "hands on" encounter....AND among a lot of people the, threat management, or "intimidation factor" of a TASER is enough to end it too. They have all seen the people screaming while getting TASED...which confuses me because getting tased doesn't hurt at all (I had to be tased to qualify to carry a TASER on duty).
TASER (located in Scottsdale, AZ) will even give you a free replacement unit (civilian) if you have to use yours, and you send them a copy of the police report. They have awesome customer service.
A TASER is a good investment in your over-all self defense tool kit.