NA4 flamethrower

The NA4/Defoliant Projector is an incendiary projector used by the UNSC Marine Corps, primarily by the Hellbringers.

Design detail
"Does anyone realize how heavy these things really are?"

- Unnamed Hellbringer Serviceman

The NA4/DP is a large and bulky; rather than being attached to the frame of the projector, the fuel tank is carried on the user's back, allowing greater fuel capacity. In addition, the weapon can use a variety of flammable defoliants to compensate for the range of atmospheric and gravitational conditions it can be used in, including highly adherent napalm and oxide-mixed fuel. It continued to serve alongside the smaller and more portable variant M7057, especially after the encounter with the Flood.

The NA4's primary function is to rout entrenched enemies. As such, NA4 users have a high attrition rate, despite the devastating damage they can inflict, due to the exposed fuel tanks which pose a critical vulnerability. The NA4 is compatible with the M301 Grenade Launcher attachment which can be used to launch flashbang grenades. Hellbringers often do so before rushing enemy positions.

Variant
The M7057 Defoliant Projector is a somewhat smaller and more portable variant of the NA4/DP. 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 in the Human-Covenant War's later period.

Trivia
The Halo Wars: Official Strategy Guide refers to the NA4 as "M6634 Defoliant System (M6634/DS)".

List of appearances

 * Halo Wars
 * Halo Wars 2