ribauldequin

thumb|A drawing of ribauldequins, as designed by Leonardo da Vinci. thumb|Organ gun in the Bellifortis treatise (written ca. 1405, illustration from Clm 30150, ca. 1430)

A ribauldequin, also known as a rabauld, randy, ribault, ribaudkin, infernal machine or organ gun, was a late medieval volley gun with many small-caliber iron barrels set up parallel on a platform, in use in medieval and early modern Europe during the Renaissance period. The name organ gun comes from the resemblance of the multiple barrels to a pipe organ.