IMO. the AA gun is probably fine, but probably too good at the higher levels of play, and will make buffing the whip harder.
So here’s a suggestion.
There’s a heat effect on the gun, why not tune that into a range limiting source of feedback. Rounds cook off and don’t consume all the powder, and burst earlier…that way you can bring in the flakk effect as a ‘range’ guide…and for the rule of cool.