But as we saw in the Pilot, Artie found them to be a great tool. Because besides knocking people out they also caused very short-term amnesia and didn't even remember the encounter and being zapped. So as a covert device that's incredibly useful.
Until recently, the Tesla took minutes (plural) to recharge between shots. Meaning, if they used it then they were potentially vulnerable for a while until it came back online. Maybe they'll miss. Maybe there's another guy around the corner. Why waste your shot if you don't need to?
However, recently Claudia upgraded them so they recharge quicker so that reason is no longer valid save for learned-behaviour.
As for a possibility
And lastly, well Pete + Myka + Steve were trained on handguns by law enforcement / federal agencies. It's probably drilled into their skulls "to not fire your weapon unless necessary" If a guy has his hands up and is making no sudden moves, then you're trained not to shoot them. The whole gun thing isn't like something you learn in high school for a test... they DRILL that stuff into you as well as HOW to shoot so everything is automatic.
Artie on the other hand, he was an NSA analyst and has been at this for a while. If he ever had that kind of formal training (as an analyst), it probably got overridden decades ago of using the Tesla.
And while non-lethal, it's still zapping a person with electricity. It's probably not something you'd want to do unless you have no choice. For example, TAZERs can cause issues when the recipient has a heart condition.
Edited on 11/28/2012 1:04pm
Edited 2 total times.