Kent in
Susquehanna's Indians has another possibility in dug parts:
"One of these was a Jaeger with all iron hardware and a full octagonal .55 caliber, 35-inch rifled barrel with a flared muzzle.
Its iron butt plate had a notch to receive its sliding wooden patch-box cover." p247
See Conestoga parts below, there is also the early gun in Moravian Gunmaking 2
July 3, 1766
The Pennsylvania Gazette
WAS LOST, on the 8th or 9th of May last, on the great Road betwixt HarrisFerry and Shippensburgh, a German rifle Gun,
about two Feet in the Barrel, large Bore, carved Stock, a white Metal Lion upon the Barrel, near the Lock, with a Scepter
in his Paw, double Tricker, double Sight, the under Brass or Copper, and the upper Iron. Whoever delivers said Gun to the
Subscriber, or to Robert Sample, in Carlisle, or to John Miller, above Carlisle, shall have TWO DOLLARS Reward,
paid by me