Trick the cops and lower your threat levels, because THIS IS A TOY! Then surprise them by filling it with actual bullets. I mean, fill both the gun AND the cops with bullets. Maybe a few civvies too.
to Install, place the folder from the .zip file into your Payday2/assets/mod_overrides/ folder. if the mod_overrides folder does not exist then create it.
Excuse me but what's the difference with a classic KSP? Both are toys anyway