The main purpose of this legislation is to change how short-barreled shotguns are classified under U.S. law, specifically the National Firearms Act. The goal is to remove short-barreled shotguns from the definition of firearms, which would simplify regulations surrounding their ownership and use. Key provisions of the legislation include several amendments to the Internal Revenue Code and federal law. It removes short-barreled shotguns from the list of firearms that require special registration and tax under the National Firearms Act.