"Nevadans are allowed to purchase, possess or sell a machine gun as long as it is legally registered and complies with federal regulations, according to the lobbying arm of the National Rifle Association.
The NRA’s Institute for Legislative Action said the state does not require a permit to purchase or possess a rifle, shotgun or handgun."
Here's what the NRA-ILA says about machine guns in NV: https://www.nraila.org/gun-laws/state-gun-laws/nevada/
It is lawful to possess, purchase or sell a machine gun or silencer that is legally registered and possessed in compliance with all federal laws and regulations.
It is unlawful to possess, manufacture, or dispose of a rifle with a barrel under 16 inches in length, a shotgun with a barrel under 18 inches, or a rifle or shotgun with an overall length under 26 inches. Peace officers and persons licensed by the United States Department of the Treasury as importers, manufacturers, collectors or dealers are exempt.