The National Firearms Association does not have an official motto.
View page
Depending on how you define expansive, in the US that would be
the 1934 National Firearms Act, or the 1968 Gun Control Act.
View page
Yes, in accordance with the provisions of the National Firearms Act of 1934.
View page
That depends on the state where you reside. In most states, there is no requirement for registration of firearms, and there in no national requirement with the exception of National Firearm Act weapons, such a machine guns.