Uncle Joes nephew was so effective at removing Thompson machine guns, any FFL holder can purchase one.
Not true, an FFL licensee has to have a special license endorsement to buy and sell Class III/NFA machine guns, suppressors, short barreled shotguns, etc. We had one when I was managing the Olde Sacramento Armoury, or to be precise, Pacific International, Inc., the parent company had one, as we were a police supply company, providing sub-machine guns to various departments swat teams around the country. Your average FFL licensee could not buy them without paying the transfer tax. We could.