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M7057 / Defoliant Projector
Official Designation: M7057/DP
Length (o/a): 116.8 cm (46 in.)
Weight (empty): 45.8 kg (101 lbs)
Weight (loaded): 55.5 kg (122.5 lbs)
Max. effective range: 13.4 meters (44 ft)
Magazine capacity: 9 x three-second bursts
Unit Replacement Cost: cR. 1,520.00
The M7057/DP is a standard chemical flamethrower, which projects and ignites a stream of a volatile, semi-liquid fuel. Flamethrowers are cumbersome and relatively difficult to use (psychologically as well as mechanically).
Referring to the M7057/DP as a weapon is a bit of a misnomer as the dee pea in its nomenclature indicate that it is a defoliant projector—to be used to rapidly clear away heavy foliage for in-theater construction projects and to destroy new or persistent growth from emplaced and/or hardened military assets. That having been said; despite being all but obsolete militarily its effectiveness as a psychological weapon is undeniable—unfortunately the psychological effect is a double-edged sword.
“makes short work of weeds and thickets—but I wouldn’t carry one into combat. Not on your life.”
“I can see where it would be real effective in ousting dug in troops, but you aren’t gonna be making any friends using it that way.”
“I don’t see where carrying around a big can of super-flammable stuff right next to my xxxx is such a good idea.”
“You know those things ship with a cart, right? You aren’t expected to carry them anywhere… they are not a weapon that you use on people… not even on alien people.”
“I hate me some baby kongs, and I will kill every man Jack of ‘em that I see, but I don’t think I could burn ‘em—best to draw the line somewhere and that seems like it.”
“Foxtrots die pretty quick once you put the fire to ‘em. We ought ‘a burn ‘em all. Low-life bastards. Burn all those low-life alien foxtrots.”
“Gotta get too close for it to be any use offensively—if you’re gonna use it as a weapon best to use it in a defensive role—fill up passages and weak-points in your perimeter with fire.”
“It takes a certain kind’a lunatic to use a flamethrower… all I’m sayin’.”
 That the M7057/DP has been frequently pressed into service as a primitive energy weapon of sorts is a distressing but irrefutable fact. It is one in a very small number of items available to UNSC personnel that remotely earmarks the user for a full battery of psychological tests.