Why does a state like Wyoming have over 100,000 registered destructive devices?

The U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives has data on the number of registered weapons in each state, split into several categories as defined by the National Firearms Act of 1934. These include destructive devices, silencers, machine guns, short barrel shotguns, short barrel rifles and other weapons.

Max Galka of Metrocosm created an interesting interactive map showing which states pack more firearms per every 1,000 persons. Wyoming leads the list with 114,052 registered weapons, 195 for every 1,000 resident. States like Texas inhabit the upper-middle range with around 12 to 15 weapons per 1,000 persons.

See how many registered firearms are piling up across the U.S.