The parts you are pointing out are the tumbler, bridle and sear. These are not only in flintlocks, but also in percussion side locks. I am not sure your identification is correct, can you post a photo of the other side of your item? Is there a large squared post for the hammer to mount on the other side?
well clearly someone long ago had the gun busted there --might have been a fight --things get dropped or lost --I'd check that spot out very carefully --because if they were fighting --they were fighting over sumpin worth while most likely --$$