Available from Morphy’s here: https://auctions.morphyauctions.com/_A__RARE_WARNER_S_PATENT_OPEN_FRAME_GROOVED_CYLIND-LOT665548.aspx James Warner was a gunsmith and owner of the Springfield Arms Company. In the 1850s he produced a series of revolving rifle designs which are interesting, but poorly documented. Only
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You do have to wonder how difficult it was to keep the brass polished on a black-powder firing Gatling gun. That’s a task the modern day soldier should thank his lucky stars he doesn’t have to do on every piece of equipment he has.