For the civilian possession, all machine guns must have been manufactured and registered with ATF prior to May 19, 1986, to be transferable between citizens.[18] These machine gun prices have drastically escalated in value, especially items like registered sears and conversion-kits. Only a Class-II manufacturer (a FFL holder licensed to manufacture firearms or Type-07 license that has paid a Special Occupational Tax Stamp or SOT) could manufacture machine guns after that date, and they can only be sold to government, law-enforcement, and military en ies. Transfer can only be done to other SOT FFL-holders, and such FFL-holders must have a "demonstration letter" from a respective government agency to receive such machine guns.[19] Falsification and/or misuse of the "demo-letter" process can and has resulted in long jail sentences and felony convictions for violators. -Wiki
You do not register again a transferrable machine gun. You can only apply for transfer. You want to conflate transfer with registration, but they aren't the same things. There hasn't been a single transferrable machine gun registered after the 1986 ban. Once in the registry, it's in the registry ergo registered.
Jumping around between civilian ownership of transferrable (registered) machine guns and military/LEO requested demonstration weapons is a desperate attempt to conflate any recording of firearms as a "national firearm registry".
So again, why do you need a national firearms registry if one already exists?
I have to dumb it down for people like you who conflate just to try for a W.
FOPA prohibits the creation of a national firearm registry.
Transferrable machine guns were registered prior to 1986. There are no new registrations, only transfers.
So what other conflations and wrong information do you wish to post in an attempt to appear right to the layman?