Gary Growe down in Columbus is supposed to be a wizard with rifles. That is as close to Indy as I know of for a riflesmith.
If you don't mind shipping it, I always recommend Neil Keller in Decatur - Kustom Ballistics
this waz the closest site i could find to the ? i have eeven though i think i know the answer and feel dumb asking. when i go to mod my mossburg 500a the parts i get that say mosburg 500 are the same and will fit right?