Why are you so concerned about it? A 60 y.o. machine gun is still a machine gun. It's also a C&R. One doesn't cancel out the other. Machine guns are not illegal, but highly regulated.
If he can find a transferable one for sale, the 03FFL will make it easier to buy, (and I think $200 cheaper) but he still has to do all the paperwork.
I don't think he can import one, mainly because the MG registry is closed. He can import C&R guns that are not MG's -- there's a form for that. I bet it's a painful process tho', especially under this administration.
"The only way to stop a bad guy with a gun is with a good guy with a gun"