No. The National Firearms Act was passed in 1934. You could not own so much as a short barrelled shotgun, withou paying a tax and registering it. A tax was several times the worth of the gun. Same with machine guns.
Semi-automatic 20mm cannon, those you could own. :) (An advertisment from the 1950s
I knew that. I forgot to add the restrictions of machine guns, short barreled rifles, sawed off shotguns and a few other types of firearms.
But the Solothurn was a semi-auto and did not require any type of registration until 1968 and then it had to be registered as a destructive device.
Many, many years ago some relatives from Minnesota came to Wyoming for an antelope (pronghorn) hunt with my dad and uncles. The visitors were to use "borrowed" rifles as we more than enough to go around. One of my uncles had one of these rounds, or one very similar, and placed it on the table beside the rifle and told them that is what they were using for the hunt. Lots of laughs all around. The cartridge base was bigger than the receiver of the rifle it was beside.
Did you or anyone you know ever get one of the BB machine guns you could order in Boy's Life? I always wanted one, but had to do with my Red Ryder.
Oh, for the good old days to return!