"Homemade copy of a trade musket using local timber and forged iron furniture.?"
With all due respect, I think I would have to disagree. When I hear the term "homemade" it brings to mind crude work. The molding around those lock panels says to me an experienced gun stocker/gun maker crafted that wood. I also personally like the buttstock lines of that gun. With relatively modest drop and a straight comb, I doubt it was hard recoiling. Of course, I am no expert and those that are will weigh in here soon I am sure.
God Bless, Marc