Fully automatic weapons can be legally owned after a mere $200 application to the ATF.

The real hurdle is the closed nature of the full auto registry creates artificial scarcity and pushes the price of the gun itself up.

But, assuming you have the money, it is a straightforward process no more complicated or time consuming than legally owning an SBR.

Edit: Not sure why I’m being downvoted. Here is the transfer form. Block 4B is where you list what type of NFA item you are buying.