NA4 flamethrower

The NA4/Defoliant Projector is a type of incendiary projector used by the UNSC Marine Corps, primarily by the Hellbringers. It is a designation which encompasses at least three distinct weapons.

M6634/Defoliant Projector
The M6634 Defoliant Projector is a large weapon which fires a napalm defoliant, often fed to the weapon by an external tank carried on the user's back. It was often used by Hellbringers in the early years of the Human-Covenant War, including at the Harvest campaign, Battle for Arcadia and Battle of the Etran Harborage. The M6634 is compatible with the M301 grenade launcher attachment.

M7057/Defoliant Projector
The M7057 Defoliant Projector is a somewhat smaller and more portable variant. Instead of napalm, the M7057 uses Pyrosene-V for ammunition, and has a gas tank located on the back of weapon rather than on the user's back. The M7057 is more decorative, with a face of a shark painted on the heat shroud. It saw use throughout the Human-Covenant War, particularly in its latter years.

At least two versions of the M7057 exist. One of these has a nozzle which extends well beyond the heat shroud, and also has a large fuel tank protruding from the rear of the weapon, which can be removed and replaced on the battlefield to refill the weapon's fuel supply. The second lacked this larger fuel tank, opting for a smaller one mounted just beneath the rear handle. Its nozzle was also much shorter, only barely extending beyond the heat shroud.

M705 Incendiary Jet Tool
The M705 Incendiary Jet Tool, often nicknamed the "I-Jet", is a compact variant of the M7057 which is suitable for use in a vacuum. It is fed by a tank-pack, and uses self-oxidizing fuel. It existed in the early years of the Human-Covenant War.

List of appearances

 * Halo: Combat Evolved for PC
 * Halo Graphic Novel
 * Halo 3
 * Halo Wars
 * Halo 3: ODST
 * Halo Wars 2
 * Halo: Silent Storm
 * Halo: Lone Wolf