Hi Daddy,
We touched on this with your other post. There's a handwritten list of stock in the Salem gunstocking shop under Valentine Beck that we think is from about 1772. On hand were 15 rifle barrels, 15 locks, brass gun mounts, brass and iron sheet, spring steel and so forth. I would bet these materials, including the locks, came down from PA.
The Moravian communities operated their "Wachovia wagons" along a route from Bethlehem through Redding Town, Lancaster and York, on down through Maryland, Virginia to Bethabara and Salem, and back again. The dozen barrels Betz received from Henry were obviously delivered from Henry in PA.
Salisbury was outside the Moravian lands and influence - though Betz eventually left Bethabara to marry a daughter of another gunsmith there. Much more could be learned of Salisbury, the gunstockers there, and their influence on many rifles that followed.
It's fine to ask questions here, but we encourage you to read Michael's new book and others, so you have a broader understanding of the trades and times. It will add value to any rifle you build or buy.