If that is the reason you are seeking a manufacturers SOT, then forget it. First, the $1,000 fee is per year. You must then actually have a manufacturing facility with all federal, state and local licenses, insurance, utilities, storage and everything else required to actually manufacture firearms. If you give up the license, you will be required to transfer any machineguns you manufactured but haven't sold. You cannot keep them.Can a class 2 manufacturer biuld MG's for his own use? I'm under the impression that they can.