在美国可以合法地购买而拥有任何非广范围杀伤性武器 如核武器 生化武器
所有手枪都是限制的 prohibited是被禁止的 但已经拥有的可以继续保留 某某年以前购买
只要有可以接受的理由 禁止的也可以买 如买来收藏或工作需要
Prohibited Firearms
a handgun that
has a barrel equal to or less than 105 mm in length, or
is designed or adapted to discharge a 25 or 32 calibre cartridge, but does not include any such handgun that is prescribed, where the handgun is for use in international sporting competitions governed by the rules of the International Shooting Union,
a firearm that is adapted from a rifle or shotgun, whether by sawing, cutting or any other alteration, and that, as so adapted,
is less than 660 mm in length, or
is 660 mm or greater in length and has a barrel less than 457 mm in length,
an automatic firearm, whether or not it has been altered to discharge only one projectile with one pressure of the trigger, or
any firearm that is prescribed to be a prohibited firearm