I am leaning hard on the caliver with fishtail butt not sure what time period that would exactly be, I am poorly versed in matchlock anything and just recently really started looking at them and admiring their simple but effectiveness in the field. I pretty much have the barrel ready and made the pan and cover, just have to drill touch hole and attach/solder pan on barrel. I know that with a flintlock I have the barrel bedded in the stock and the lock mortise cut before marking and drilling the touch hole, Is this the same way a matchlock would be done or could I adjust the stock to the barrel with pan and touch hole already in place? I have not made my trigger and "serpent" lock mechanism yet. Forgive my ignorance on nomenclature.