Incendiary weapon

A flamethrower is a military assault weapon that projects a stream of blazing oil or gasoline against enemy positions. It consists of one or more fuel tanks, a cylinder of compressed gas to supply the propelling force, and a flexible hose with a trigger-nozzle that ignites and sprays the fuel. Portable flamethrowers are carried on the backs of ground troops; larger units may be installed on tank turrets.

Flamethrower can refer to two weapons:
 * M7057 Defoliant Projector, usable in the PC version of Halo: Combat Evolved, Halo 3, and Halo 3: ODST.
 * NA4 Flamethrower, carried by Hellbringer troopers in Halo Wars.