tirk, tell me about this gun. I have two but they fugly. Did that one have some customization in terms of changing out some parts? I need to go shoot my G43. Haven't shot it since that one time.
Flare guns as a weapon? I have a flare gun I bought years ago because it was required equipment on a boat. I no longer have the boat but I still have the flare gun. I have never fired it. It looks like this. A flare would seem to be a pretty destructive thing if you got shot by one. It's probably legal even if somebody were to design a revolver or even a semi auto flare pistol firing the 12 gauge flares. Somebody who knows how to design something like that on a 3D printer could make it available to everybody. There are commercially manufactured inserts available in a variety of bullet size to convert a flare gun to shoot real ammo but they are dangerous and likely to explode. That's surely because the guns aren't designed for that but one could be. http://www.guns.com/2013/01/02/flare-guns-as-weapons/
Still would be good to carry on the street somewhere like Chicago or DC where real guns are illegal. A good self defense weapon for a woman to have in her purse.