All too often I stumble across the most interesting firearms in this building, and this week it is a Treeby 14-round capacity shotgun patented by Thomas Treeby in 1855. That's well over 100 years before Kel-Tec's KSG or the SRM Arms 1216, and according to National Firearms Museum curator Doug Wicklund, this piece is one of possibly 2 in existence.
I snapped a few shots with my iPhone so you, too, can marvel.