He stated at the beginning of the article “except in a very few cases” and that is CORRECT.
In addition, McMoron banters on about the M-4, which was developed in the 1990s. So if you can show me a single M-4 that was registered in 1986 as a machine gun and is legally in the hands of a civilian, I can sell you my house in Houston with a beautiful view of the mountains.
If you think you can just run out and buy a 240B if you just get a tax stamp, you’ve got another thing coming.
You are forgetting that you can manufacture you own firearms including M4s. You cant sell them or transport them across state lines but you can make them for yourself.