So how many Enfields were in the hands of US forces at the end of the ACW?
Or the various state militias?
Money was tight everywhere.
For that matter was the design for the Allin around earliy enough for the British trials that led to the adoption of the Snider?
What other nations used the Enfield when everyone was looking at going breech loader?
Might it have been a test/ sales piece done up by some interprizing American gun seller "Not only can we provide you with once dropped captured and surplused Enfields, but we can provide them with THE LATEST American improvements as used by the vitorious GAR, Cheap!"
Not related to the OP:
When I was at aat the site of Lee's surrender a decade ago, the folks running the place claimed that the rifles captured their were used to pave a road. Wonder how long it took the locals to dig many up for parts?
-Bob Hollingsworth