You need to think this threw a lot more.
You came to an internet board asking for legal advise on a subject that this site does not cover. If you have the cash for this please be smart about it and go find a lawyer.
Pusangani already said it, we do dress up and play soldier. But I would be willing to bet that very few people will be in the market for NERF airsoft guns. Its bad enough that we deal with the clear soft.
Atleast with that we can paint and change it up to look more realistic.
Airsoft is such a grey area right now with the law not being entirely clear on a bunch of it that I can only suggest you speak to a few lawyers to make sure they all know what they are talking about.
Good luck, I think we can all agree you'll need it.