What Is The Best Nerf Gun In The World What Is The Best Way To Find Out Laws For A Specific Subject?

What is the best way to find out laws for a specific subject? - what is the best nerf gun in the world

This has been beaten into my head a bit - I'm quite rare, and had an idea that I have assembled a plan to build a system outlined on the roof of my car that had more style weapons are nerve to fire it -- by pressing a button in the cockpit, you might compressed air to launch it. Physics of small cylinders of foam on one side (of course it does not work while driving) and safety on the one hand (I will not use it for people who do not, or not as I would go), I 'm more concerned interested in legal aspects - I have several people had told me, it's probably against the law of the rocket launcher mounted on a vehicle and keep it legally sponsor.

My question is where in the world I seeoutside of the legality of such a system? I suspect that would be regulated by the state, but the government would be responsible for these things? Is this kind of thing, and searchable online? State of Georgia, significance.