hi there 2FF, I have a Monarch that a friend gave me. He found it in his storage barn all rusted over after leaving it there after forgetting it. He was going to throw it away and then thought to ask if I wanted it. It is in pitiful condition, but I can't imagine that with a enough tender loving care it wouldn't be able to shoot again. I am going to make a project of it and see what I can do. It's nothing fancy, and the door to the patch box is broken off. Also the Hammer is bent, and then there is the rust! I have not thoroughly checked yet, but have been told that some parts may be available through online sources. This is actually my first post here since I just joined. Oh by the way, it appears to be 50 cal.