Before the modern era of firearms, gunmakers came up with ingenious ways of increasing the ammunition capacity and reloading speed of firearms. These efforts (and My Little Pony) I find a constant source of fascination.
This is the Harrington Volley Gun. It and similar percussion designs allowed a user to reload quickly by replacing the entire chamber block and firing all rounds -- in this example seven .31 caliber bullets -- with a single cap.
Link -via Pocket Pistols, Historic Firearms, & Curiosities | Photos: Gun Data
"with a single nipple." I think you mean cap. The percussion cap which ignites the powder fits on the nipple.
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