The thing you did post, Rob, states that they are brothers (assuming this is the same Jacob Albright, Jr., who was the gunsmith).
But I still don't understand why this suggests that Christopher/Stophel Albright was a gunsmith.
Andreas Albrecht, for instance, had five sons but did not train most of them as gunsmiths. William Henry of Lancaster had six sons who lived into early adulthood (John J., William Jr., Abraham, Matthew, James, Benjamin W.) and only two of them, it seems, he directed toward the gunsmith profession.
Scott