If you've explored all avenues for a signature in your locality, there is another tactic you can try. While corporate ownership is possible, its more expensive and a bit more of a hassle than ownership by you personally - you have to keep the corp alive, including filing any necessary tax returns, paying any required annual fees to the state, business licenses, etc. However, instead of actually obtaining a weapon through a corp., you can use it to try to pressure your CLEO into giving an individual signoff. Try and get some face time with the sheriff to explain what you want. If/when he says no, politely and calmly explain that their approval and signature is not required, and there are other methods at your disposal to legally purchase and possess an NFA weapon in their jurisdiction. By giving you a signoff, they get to keep track of what you have in your possession (they see what you're buying when they sign-off on your form 4). OTOH, if they refuse to sign, explain that you will still obtain the weapon in question, as well as any other NFA weapons you wish, at any time, without their approval or notification by means of corporate ownership. In other words, you give them a choice - give me a signoff and you'll know what I've got and when I got it, or I will completely circumvent your authority and obtain any weapons I want, whenever I want and you'll be completely in the dark as to what types of weaponry are in my possession. (And, because the form 4 is a tax document, the local CLEO cannot get info from BATF without enough probable cause to support a warrant).