"IF" this gun has non-rebounding hammers, which most inside hammer guns do, then the firing pins are locked in by the hammer tension, thus they're not apt to shake down. Can you get something on the cocking levers to cock the gun. Lacking that I would guess you are going to have to remove the locks.
First movement of the barrels should start retracting the hammers, sounds like this one is Lagging & there is not enough tension on the snap cap springs to push the hammers back, thus the pins are locked into the cap.
Last edited by 2-piper; 05/26/17 03:05 PM. Reason: correct typo
