This is Samuel and I will discuss this and provide you information in this regard
In June this year, the House voted to let non-violent felons win back their gun rights and that was the amendment by Ken Buck.
Unfortunately, the money for this measure was removed by the US Senate and so there is no process as the amendment set forth.
For purposes of the Gun Control Act, a person is not considered convicted if he or she
(1) has been pardoned,
(2) had his or her civil rights restored or set aside, or
(3) had his or her conviction expunged or set aside, unless the pardon, restoration, or expungement expressly bars shipping, transporting, possessing, or receiving firearms (18 USC § 921(a)(20) and (a)(33)).
Anyone convicted of a federal offense may apply for a presidential pardon. Federal regulations (28 CFR § 1.1-1.10) specify the rules governing petitions for obtaining such pardons . Your constituent, who appears to have been convicted of a federal offense, may contact the Pardon Attorney's Office to inquire about the procedures for obtaining such a pardon. The address is:
Pardon Attorney's Office
U.S. Department of Justice
Washington DC 20530