The Sun Cartridge is one of the Sun-attribute Box Weapons of the Sistema C.A.I. owned by Hayato Gokudera.
Description[]
It is ammunition for the Flame Arrow. It comes in a form similar to a machine gun's ammunition belt. It fires several solid projectiles covered with Sun and Storm Flames in quick succession.
The Activation characteristic of the Sun Flames gives the projectiles an irregular acceleration that confuses the enemy, and the Disintegration characteristic on the bullets deal extra damage.