J.W. , those air guns got quite a bit of meat for them. It was also the gun that Napoleon feared the most. Some of them had a ball type air reservoir, and some had the reservoir in the stock. One design had it so you just unscrew the stock, and then stick the pointed rod, into a tree, and start pumping. Even though they were air guns, they still had a lock on the side, to make them look like normal guns. They were so superbly made, that some have held air for more than five years, with no appreciable air loss!
That is precision craftmanship!
Wish it was like that today. I have seen some of them at gun shows, and they are marvels of engineering, and craftsmanship.
Wayne