The one major OZ laser company I know of, wrote down the serial numbers to their gear, waltzed on over to see their local constables, and got the weapons permits for their large show gear, with no problems. They did not like it, they did not think they needed to do it, but they did it, so as to not take a chance, and have had zero problems or contact since.

Sorry you have to go through that, but if your regulator is your local cop, that is usually a hell of a lot easier then dealing with ANY federal government.

Steve