I watch Forgotten Weapons every fucking day. I am intimately familiar with both the FOPA and FAWB. Both of which repeatedly and continuously stood up to constitutional challenges. The Supreme Court has repeatedly disallowed gun manufacturers from selling new “automatic weapons” (aka a class of bearable arms) to the general public. Additionally the Federal Assault Weapons Ban was repeatedly found to be constitutional, and the only reason new weapons that meet those classifications are sold today is because the FAWB had an automatic sunset clause. It could legally be reinstated by congress at any time.
While it is true that you can get an FFL and purchase a pre-1986 automatic weapon with a transferable tax stamp, the Supreme Court has BANNED the sale of all new automatic weapons. Therefore, your previous argument doesn’t hold water. Take the L and move on.