This handbook is primarily for the use of persons in the business of importing, manufacturing, and dealing in firearms defined by the National Firearms Act (NFA) or persons intending to go into an NFA firearms business. It should also be helpful to collectors of NFA firearms and other persons having questions about the application of the NFA. This publication is not a law book. Rather, it is intended as a "user friendly" reference book enabling the user to quickly find answers to questions concerning the NFA.