M7057 flamethrower (Earth-7149)

"Most animals retreat from fire, yes? Fire, yeah. Parker, can you rig three or four M70s? Give me about twenty minutes, I'll do it."

- - Ash, Arthur Dallas, and Dennis Parker

The M7057/Defoliant Projector, more commonly known as the M7057 flamethrower, is an incendiary projector manufactured by the Armat Battlefield Systems for both civilian and military use, and which are primarly used for fortification of installations and spaceships. It is a variation of the UNSC-issued M240 flamethrower.

Design details
The M7057 flamethrower is a standard chemical flamethrower, which projects and ignites a stream of a volatile, semi-liquid fuel. Like the M240, the M7057 flamethrower is cumbersome and relatively difficult to tactically employ.

It is one of two human weapons that overheat, with the other being the M78 phased-plasma infantry gun. It has a built in failsafe system that stops the weapon firing when it reaches a certain temperature. If the weapon could be fired while overheated, it would melt or explode, and the heat and the flames would harm the user.

Trivia

 * Source.