A starting point may be firearm law manuals, if someone wrote a good one for your state. (The one for my state, for instance, has gun laws by counties and even by towns. This sort of variation makes me nuts. We aren't walking encyclopedias of arbitrary legal codes, so how can we make sure we don't break the law when we go somewhere new?) That's still no substitute for professional advice, because we civilians can easily misunderstand law or the application of law.