Does the p320 go off if it's smacked still?
I know some of you Sig fluffers will tell me it was never a thing, but I saw a video once where a guy hit the back of the slide with a hammer a few times and it went off so yes it was indeed a thing for the sample size tested.
I have a concept in the initial brainstorming phase for two handguns connected by a cable to be swung wildly and think the unpredictable effect of discharge will enhance the capability.
Have you considered using a rimfire?
Do they still make 5mm rimfire or .44 Henry?
This needs to be obscure.
Wild bill Hickok carried a .32 rimfire!