This weekend I traded into one of these at a local gunshow. It needs some work but looks like an interesting rifle. A quick internet search says some were made by Pendersoli but I do not see their mark on the barrel. Is anyone familiar with these? This rifle is 50 caliber, missing rear sight and has a damaged or modified half **** notch. I've not checked the bore yet but this is a fairly light rifle and I'm thinking 50 caliber might be a little ambitious for the design. I can see this having a lot of potential rebarreled in 36-40 caliber of even 28ga smooth bore. Does anyone know what rear sight it should have had?