It may be possible to convert it to semi-automatic only, that would make it legal. Since the gun has been stashed away for so long, who's to say when the conversion took place?
My uncle came back from WWII with a schnellfeur and a drilling in his duffle bag, so there are probably quite a few such war trophies out there that nobody knows about. However, there whereabouts of these items are unknown today.
He had a small fire in his house back in the 70's. After the firefighters left, he took inventory and the aforementioned items were MIA. It is believed that they were stolen by one of the firemen, but since he wasn't really supposed to have them anyway, he couldn't exactly report them stolen..............
