The date of your conviction does not matter. The type of conviction does.
If you were convicted of a forcible felony, a felony involving a drug crime, a felony weapons violation, or were 17 or younger and charged with a felony or aggravated misdemeanor against a person, then you cannot restore your gun rights. (Iowa Stat. 914.7).
If your felony wasn't as described above, then you can petition for restoration of your citizenship rights at any time after the conviction. (Iowa Stat. 914.6).
You can get the restoration or rights forms at the following link:
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