The triple barrel, 18-shot Pistola con Caricato revolver

The Pistola con Caricato is a three-barreled revolver with 18 chambers in 6.35 x 16 mm semi-rimmed caliber

A host of unusual firearms have been floated and (mostly) abandoned over the two centuries of largely trial-and-error design. After our recent coverage of Arsenal Firearm's AF2011-a1 double barrel semiautomatic pistol, we wondered if more extreme versions of multi-barrel repeating handguns existed. The outlandish Pistola con Caricato three-barreled revolver is a definite candidate.