What&#x27;s the cheapest device one could build that isn&#x27;t a firearm, but could reproduce the sound of a gunshot with enough fidelity to fool this thing? Bonus if it can do a nice AK-47 machine gun sound or something like that.<p>Assume that the device requires electricity. It probably should be wifi-connected, so that if you can get it close enough to a Starbucks or something, you can control it remotely. Should ideally be small and unobtrusive so that it&#x27;s not easily spotted. Shouldn&#x27;t need any refillable fuels.<p>Would be fun to put the plans up on the net so that many people would build and field these.