Stay safe Eeeeek !
Here's what the NRA says about that:
NATIONAL FIREARMS ACT FIREARMS
A machine gun is defined as any firearm which shoots, or is designed to shoot, automatically, more than one shot, without manual reloading, by single function of the trigger. The term also includes any conversion part, frame or receiver of a machine gun, or any firearm deemed as such by the federal government. Upon a showing of good cause, a permit for possession and/or transportation may be issued by the Department of Justice.
It is unlawful to possess a destructive device, including tracer or incendiary ammunition or any firearm larger than .60 caliber which fires fixed ammunition, or any fixed ammunition for such firearm. Excluded are shotguns and shotgun ammunition.
NOTE: It has been reported that the Department of Justice refuses to grant such permits.