This is a great article and shows the stupidity of the ATF and us govt.
http://www.gunnews.com/atf-muddies-machine-gun-waters/
https://www.m4carbine.net/showthread.php?152436-Did-the-ATF-Open-the-Door-for-Manufacture-of-New-Machineguns-for-trust/page4&p=1923075
Sorry for the re post.