TexasCHLforum.com

Relevent section from the ATF's web page:

"The firearms may be transferred on a tax-exempt basis to a lawful heir. The executor would apply on ATF Form 5, Application for Tax Exempt Transfer and Registration of a Firearm, for a tax-exempt transfer to a lawful heir. A lawful heir is anyone named in the decedent’s will or, in the absence of a will, anyone entitled to inherit under the laws of the State in which the decedent last resided. NFA firearms may be transferred directly interstate to a beneficiary of the estate. When a firearm is being transferred to an individual heir, his or her fingerprints on FBI Forms FD-258 must accompany the transfer application."


It is still be a good idea if they turn out to be full auto to talk to someone more knowledgeable of the laws involved in the transfer before taking possession of them.