May aliens legally in the United States purchase firearms?
An alien legally in the U.S. is not prohibited from purchasing firearms unless the alien is admitted into the U.S. under a nonimmigrant visa and does not meet one of the exceptions as provided in 18 U.S.C. 922(y)(2), such as possession of a valid hunting license or permit.

[18 U.S.C. 922 (d)(5), (g)(5) and (y)(2); 27 CFR 478.11 and 478.32(a)(5) ]

Last Reviewed January 30, 2020
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https://www.atf.gov/firearms/qa/may-aliens-legally-united-states-purchase-firearms