I think the machine gun issue is mostly settled. But there is a lot of controversy lately about what is a short barreled rifle (which requires a special federal

I think the machine gun issue is mostly settled. But there is a lot of controversy lately about what is a short barreled rifle (which requires a special federal permit). I don't know the specifics but the laws have been changed after people purchased their guns, such that if they were caught with them they would be in violation of serious gun laws (essentially as serious as having a machine gun without a permit)