That was hyperbole. An exaggeration, if you will, for the sake of humor.
However, as with most early breechloaders, they were rather fragile and tended to break a lot. They were also rather expensive as well.
Its basically the Yamato paradox. You can build one giant battleship or a thousand fighter planes. Or, in this case, 1 rifle or 50 muskets (rough guess, of course).
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