And, his father Jacob was a recognized gun maker in Somerset County. Good questions Schreck. That he purchased components from Tryon, and perhaps others was a somewhat standard practice in the later days of muzzle loading and likely much earlier. Bedford, Somerset and Fulton counties seemed to have been somewhat behind the times when compared with other counties for a time and so access to a load of rifles would have been harder to come by. That is not to say that he did not purchase the work of others, but from whom? There is no maker in these counties that made a half stock gun routinely such as this one until Mier came along. And,most of his work that I have seen is of full stocked rifles.
Dick