Cooool...*big grin*
Thanks for the info...
I know there are cannon in private hands...and they still compete with them...
Was pretty sure about the aircraft restictions...
Didnt know about arming surplus vehicles(although I should have guessed such) ...I suppose that requires an FFL?
Depends on the state. In TX, if you legally possess a class III weapon (like the M2), you can mount it on your vehicle however you wish, so long as it does not threaten others (no guns on the trunk to discourage tailgaters, for example.
Cannon of any size are permitted. The catch is that they must be muzzleloaders.