Morris & Brown Conical Repeating Rifle
Produced in New York City right around 1861 (patent date is Jan. 24, 1860) only about 50 of these unusual leverguns were believed to be manufactured.
Six-shot .44 caliber rimfire, there are 6 chambers in the breech which funnel into a single barrel. The ring lever behind the exposed trigger (no trigger guard) cocks and rotates the firing pin.
Marked CONICAL REPEATER on the left side of the frame.