I'm not convinced that this rifle was made as a percussion gun. If you look at the top photo above the lock you can see where the stock was relieved for the flint hammer "stop". To those of you that are not familiar with flintlocks, on a percussion gun, the hammer fall is halted by the nipple, on a flint gun, the hammer is slightly off set with a step in the back of it and that step comes to rest on the top of the lock plate. It is necessary to then relieve the wood a bit to clear the hammer "step". Also in that same photo do I see on the front upper part of the lock plate a plugged hole where the frizzen may have been attached? I would liker to see the inside of the plate to confirm......Also, if you look at the second photo you can see where the wood under the lock plate in the bottom of the barrel channel has been cut out and "squared", was this for the pan "bolster to clear?,,,,Just wondering,,,,,,????...Ed