Quote Originally Posted by Ed L. View Post
On a different note, if I were to buy a select fire gun that is listed on the form as having a 11.5" barrel, what NFA paperwork would I have to do to be able to legally use a shorter barreled upper with it?

On a similar note, I have an SBR lower that is registered as having a 10.3" upper. What changes and paperwork do I need to do to enable me to use a shorter barreled upper?

thanks
Nothing needs to be done. The BATFE "requests" to be notified so they can keep the registry accurate, but informing them of changes is not required by law.