I have submitted my application for my Federal Firearms License and have a few questions. 1. How long does it take for the ATF to contact you after submission? 2. Is it mandatory that you have a gun safe to store all overnight deliveries? 3. Is it true you have to have a manufacturing license to just put AR15 uppers and lowers together? 4. Please feel free to volunteer any information that may be of help to me in this endeavor!