Automatic and Concealable Firearms Design Book Volume I-III (Repost)

From the foreword: The primary purpose of this series is to familiarize gunsmiths, collectors, and law enforcement officers with improvised firearms. These volumes incorporate detailed drawings in order to teach the reader principles of automatic weapons conversions, and other mechanical aspects related to improved weapon construction and modification. The illustrations will also enable law enforcement agents to identify and classify improvised weapons.
Warning: It is against the law to manufacture a restricted or prohibited firearm without an appropriate license from the federal government. There are also state and local laws prohibiting the possession of such devices in many areas. Severe penalties are prescribed for violations of these laws. Be warned!