Give your local BATF office a call. They should be able to answer your questions.
Welcome to FR.
It's a state law, not federal. Even it was federal the advice of some low leve BATFE flunky is not worth anything. They are quite likely to come arrest you and confiscate your firearms on the basis of the question. Even if they initially say what you've got is OK, another "agent" may disagrees and bust you. Unless you get it from them officially and in writing, and from the proper official, it's just vaporware.