基本上不是公民或綠卡，就不能合法買槍，全美適用。有少數例外情況，去谘詢本地槍店或警局。
http://wdfw.wa.gov/help/questions/118/What+are+the+firearms+possession+rules+for+non-U.S.+citizens%3F
What are the firearms possession rules for non-U.S. citizens?
- It is a class C felony for any person who is not a citizen of the United States to carry or possess any firearm, unless the person: 1) Is a lawful permanent resident; 2) has obtained a valid alien firearm license pursuant to RCW 9.41.173; or 3) meets the requirements of RCW 9.41.175.
- A citizen of Canada may carry or possess any firearm so long as he/she possesses: Valid entry documentation; an approved U.S. Department of Justice ATF-6 NIA application and permit for temporary importation of firearms and ammunition by nonimmigrant aliens—if required under federal law; a valid hunting license; or an invitation to participate in a trade show or sport-shooting event being conducted in Washington or in close proximity.
- A nonimmigrant alien, who is not a resident of Washington or a citizen of Canada, may carry or possess any firearm without having first obtained an alien firearm license if the nonimmigrant alien possesses: A valid passport and visa showing he/she is in the country legally; an approved U.S. Department of Justice ATF-6 NIA application and permit for temporary importation of firearms and ammunition by nonimmigrant aliens—if required under federal law; a valid hunting license; or an invitation to participate in a trade show or sport-shooting event being conducted in Washington or in close proximity.
http://en.wikipedia.org/wiki/Gun_law_in_the_United_States
The following list of prohibited persons[5] are ineligible to own firearms under the Brady Handgun Violence Prevention Act.[6]
- Those convicted of felonies and certain misdemeanors except where state law reinstates rights, or removes disability.
- Fugitives from justice
- Unlawful users of certain depressant, narcotic, or stimulant drugs
- Those adjudicated as mental defectives or incompetents or those committed to any mental institution and currently containing a dangerous mental illness.
- Non-US citizens, unless permanently immigrating into the U.S. or in possession of a hunting license legally issued in the U.S.
- Illegal Aliens
- Those who have renounced U.S. citizenship
- Minors defined as under the age of eighteen for long guns and the age of twenty-one for handguns, with the exception of Vermont, eligible at age sixteen.
- Persons convicted in any court of a misdemeanor crime of domestic violence (an addition)
- Persons under indictment for a crime punishable by imprisonment for more than one year are ineligible to receive, transport, or ship any firearm or ammunition
Those who already own firearms would normally be required to relinquish them upon conviction.
