I have received a neat little park rifle by G.E. Lewis for a 3 day inspection. I think it needs to go back to the seller as the top rib is visibly loose from about the rear sight back to the breach.

Who might fix this, and any guesses on what that would cost? I'm in the USA.

Background on the gun: jones undercover, non-rebounding locks, great bores. Will chamber loaded and unloaded 360x2.25" BPE cases. Mechanics seem OK otherwise. Gun is from 1877-78.

Rifle looks to have been refinished properly long ago. Buttplate has corrosion and stock near butt needs its finish refreshed/reoiled, but otherwise the gun is in decent shape and not bad for the price (if the rib hadn't been off).

Advice on who to talk to?

Chris