(B5) Are there certain persons who cannot legally receive or possess firearms and/or ammunition? [Back]
Yes, a person who –
(1) Has been convicted in any court of a crime punishable by imprisonment for a term exceeding 1 year;
(2) Is a fugitive from justice;
(3) Is an unlawful user of or addicted to any controlled substance;
(4) Has been adjudicated as a mental defective or has been committed to a mental institution;
(5) Is an alien illegally or unlawfully in the United States or an alien admitted to the United States under a nonimmigrant visa;
(6) Has been discharged from the Armed Forces under dishonorable conditions;
(7) Having been a citizen of the United States, has renounced his or her citizenship;
(8) Is subject to a court order that restrains the person from harassing, stalking, or threatening an intimate partner or child of such intimate partner; or
(9) Has been convicted of a misdemeanor crime of domestic violence
(10) Cannot lawfully receive, possess, ship, or transport a firearm.
A person who is under indictment or information for a crime punishable by imprisonment for a term exceeding 1 year cannot lawfully receive a firearm.
Such person may continue to lawfully possess firearms obtained prior to the indictment or information.
[18 U.S.C. 922(g) and
, 27 CFR 478.32]
http://www.atf.gov/firearms/faq/faq2.htm#b5
Please note that #1 doesn't require that a person serve more than a year, just that the crime he was convicted of has an option of more than one year imprisonment.