I'm not sure I am but I really appreciate the responses. The Continental Army would use any lock, stock and barrel they could put together to make a weapon. The French sent us a lot of material. I think this gun it a Pennsylvania Committee of Safety musket due to the distinct "P" on the barrel. I think part of it is a French 1774 and French 1777. It possibly could have been restocked. In the 1700's.
I wanted to add a few more details and photos. On the top of the barrel on the right side of the "P" there MAY be another mark. It looks somewhat like a Maltese cross with part of it missing. What do you think? On the left is a "triangle" and on the right a vertical line, vertical as in oriented to the "P".
On the lock, above "Charleville" it almost looks like two large scroll letters "US" but I wouldn't bet anything on that.
BTW the pan is made of brass. Gun has never been truly "cleaned". It's original to how I got it. I did wipe it with some oil today.
Also, what kind of wood is this? I know oak, pine and sometimes chestnut, but...walnut or cherry? The first picture is from the side, the second on the bottom. Another possibility is mahogany. I was looking at the grains. I used a 21 megapixel camera for this. Ideas please?
I think i found it in my gun book French smooth-bore Flint-lock musket, cal. .75 engraved on the lock in script Charleville ? i cant make out the letter in my book. Iron-mounted; wide iron bands. Gun photo in my book, formerly owned by Elisha Crosby, Ashburnham, Mass., and carried in the Revolutionary War. WOW is all i can say. I will upload that name and a photo of the gun. The gun photo in my book is small but it sure matches your flint lock. Hope this helps. Forgot to mention that photo has a bayonet turned around and in the barrel lol.