<Li> National Firearms Act ("NFA") (1934): Taxes the manufacture and transfer of, and mandates the registration of Title II weapons such as machine guns, short - barreled rifles and shotguns, heavy weapons, explosive ordnance, silencers, and disguised or improvised firearms . </Li> <Li> Federal Firearms Act of 1938 ("FFA"): Requires that gun manufacturers, importers, and persons in the business of selling firearms have a Federal Firearms License (FFL). Prohibits the transfer of firearms to certain classes of persons, such as convicted felons . </Li> <Li> Omnibus Crime Control and Safe Streets Act of 1968 (1968): Prohibited interstate trade in handguns, increased the minimum age to 21 for buying handguns . </Li> <Li> Gun Control Act of 1968 ("GCA"): Focuses primarily on regulating interstate commerce in firearms by generally prohibiting interstate firearms transfers except among licensed manufacturers, dealers and importers . </Li>

What are the gun control laws in the us