if your not in jail and not under arrest I believe the founding fathers would have found you have no restrictions on owning firearms..
And neither did lots of people in this country, for a long, long time. When you got out of jail/prison (after serving your full sentence, as early release was simply an inmate's dream), you got your life, and all your rights back.
Not sure just when it began, but by 1968 it became Federal law. Felon, no guns, ever,the rest of your life, period, unless a court said otherwise.