The federal offense of possession of a firearm by a felon is defined by statute, Title 18, United States Code, Section 922(g)(1). The offense is a felony. The law provides the following:
It shall be unlawful for any person-
(1) who has been convicted in any court of, a crime punishable by imprisonment for a term exceeding one year;
to ship or transport in interstate or foreign commerce, or possess in or affecting commerce, any firearm or ammunition; or to receive any firearm or ammunition which has been shipped or transported in interstate or foreign commerce.
See 18 USC 922(g).