Flamethrower

Scorpion's puppeteer can shoot fire from the pipes in its hands, making them like flamethrowers. The flames are fierce enough to melt rocks and incinerate a metal kunai that was thrown at it near instantly. The ammunition is sealed in the the first scroll on its back. . During Kankurō's use of the puppet, the ammunition scroll is nowhere to be seen, implying that the flamethrowers may be used without it.

Trivia

 * Shura's umbrella also has a flamethrower installed within.