Gun rights in Okla after 29 yrs

If a person was convicted of a nonviolent crime in 1980 which carried 10 yrs probation, restitution, and I think 20 yrs defferred sentence, is there a way to have their gun rights restored in Oklahoma. All the proper "hoops" were jumped through without incident and have not had any other legal trouble.Tried the governor's pardon route years ago and was just a waste of time and effort.
Thanks for the advice

Very unlikely but if it is that important it is always worth a try.