Loaded with, say, lead 00 buckshot projectiles at subsonic velocity - say, equivalent to a slingshot - or even better, round ice balls - I can see shopkeepers in riot-prone areas making good use of something this low key and silent to break up a mob at times when the police are ordered to "stand down" as they were in many places during the 2020 riots. I imagine it wouldn't be too hard to get design info and adapt it using modern materials. With a variable speed motor, one could even "tune" the power. As for accuracy - how much do you need for "minute of mob?"