Short of a full pardon, I believe the felon can petition the Governor for a restoration of civil rights, which does not excuse the crime (as a pardon does), but allows the person to exercise all of their normal civil rights (firearms, voting, etc.).
Edit: Interesting reading, with statute citation and legal precedents...
http://www.topix.com/forum/us/federa...6U8KK6P0G4EJCK