No, but I have owned machine guns and SBR in the past and dealing with them was very easy and they were very helpful during all of the process including eventual sale of same. NFA Branch is much more difficult to interact with now that they moved, and you might have to write a letter and ask if your plan would be accepted. That might take a few months. If you know your item fits a specific category, you can merely apply for registration. Do NOT take ownership of the item before receiving your tax stamp, however. Yikes!

Most people that I have spoken to who have problems with NFA have the problems because they do not fill out the application properly and NFA takes a long time to get back to them about the problem, and then they must restart the app.