I’ve decided to start this as a diary to making this rifle right again. I will bring up many subjects but trying to keep the answers in one place. First, what do I mean unknown. This 54 cal musket long rifle was gifted to me. Only markings visible are 54 cal and a 4 digit serial #. Removed barrel from stock to find made in Italy, black powder only, and some tool marks. That makes it impossible to reference manufacturer when looking for parts. Two main parts missing were the nipple and the front sight. This has been Nickel and dimeing me into poverty (slightly kidding). Found nipple to be metric and front sight to measure in standard. Still looking for front sight to fit.