主题：【原创】在美国怎样的人能买枪？ -- 东湖珞珈

我查了ATF的网页， 他们是这么说的：

(A15) Q. May foreign visitors and other aliens legally in the United States purchase or possess firearms and ammunition while in the United States?

A. Nonimmigrant aliens generally are prohibited from possessing or receiving (purchasing) firearms and ammunition in the United States.

There are exceptions to this general prohibition. The exceptions are as follows:

nonimmigrant aliens who possess a valid hunting license or permit lawfully issued by a State in the United States;

nonimmigrant aliens entering the United States to participate in a competitive target shooting event or to display firearms at a sports or hunting trade show sponsored by a national, State, or local firearms trade organization devoted to the competitive use or other sporting use of firearms;

certain diplomats;

officials of foreign governments or distinguished foreign visitors so designated by the U.S. State Department;

foreign law enforcement officers of friendly foreign governments entering the United States on official law enforcement business; and

persons who have received a waiver from the prohibition from the U.S. Attorney General.

Significantly, even if a nonimmigrant alien falls within one of these exceptions, the nonimmigrant alien CANNOT purchase a firearm from a Federal firearms licensee (FFL) unless he or she (1) has an alien number or admission number from the Immigration and Naturalization Service AND (2) can provide the FFL with documentation showing that he or she has resided in a State within the United States for 90 days prior to the firearms transaction.

还有其他更多问题，直接看他们的网页：

http://www.atf.gov/firearms/faq/faq2.htm#a15