The answer is yes, but it's hard to answer that question with the information you posted. Is this a historic weapon? Was it brought back and just discovered? Are you sure it's a machine gun?
Texas A&M - 148 years of tradition, unimpeded by progress.
I think the last amnesty to register was in 1968. I'm assuming you're asking about a hypothetical. In this hypothetical situation, it would be best for the possessor to keep its existence a closely guarded secret or dispose of it discreetly. Possession could result in 10 years in Federal PMITA prison and a destroyed life. Unbelievably ridiculous and unAmerican regulations, but that is reality and the Feds are ruthless!