Yeah, they do!
What do you think is easier to acquire and more legally protected for an average person to possess, in the US, in CA?
A shotgun?
Or a high voltage military grade active radio frequency jammer?
Or were you maybe thinking of an even higher voltage military grade microwave / laser beam emmitter?
... just please tell me you were not thinking of a net gun that can somehow reach an altitude of a hundreds to thousands of feet.