[Source] The BT X-42 heavy flamethrower, also known as the Heavy Republic flamethrower, was a type of flame-projecting weapon developed for the Grand Army of the Republic during the Clone Wars. Used by the clone flame troopers, they were designed for use against unarmored targets, such as Geonosian warriors during the Second Battle of Geonosis. It was also used by the Mandalorian Royal Guard.