a good blackpowder revolver is the way to go. Look for one that has a strap across the top of the cylinder – many don't, because it's cheaper, and the smaller calibers didn't really need them back in the day when you could get your local blacksmith to whip up a replacement frame, no paperwork.
> And btw, I'm asking this because I'm a prohibited
Until that's is cleared, your life is pain. Guns are only a part of that condition, but its one we can't dig you out of.