Pretty sure the whole thing is Sharon built Semi. They used Davis locks and pretty much any wood you wanted and sold them as "kits" or as total builds. Hall was a pretty dang good barrel maker and builder but back then (70's and 80's) muzzleloaders just didn't have the attraction they do now and he went bankrupt. If you find you a Hall Sharon barrel hang on to it like a python because you would be hard pressed to find a better shooting big bore ML barrel on the planet.