For an overview of flamethrower models, see Flamer.

The Flamer is a specially engineered flamethrower suited for extended combat engagements. It delivers sustained energy damage and can completely immolate a target.Fallout 4 loading screens

The flamer is a heavy weapon in Fallout 4.


The flamer in the Commonwealth differs notably from the versions in the Capital Wasteland and Mojave Desert. Its fuel tanks are located directly underneath the main body of the weapon, rather than attached to the user's back, and the weapon has a more industrial appearance.

Functionally, the Commonwealth flamer comes with a significantly larger fuel tank than its DC and Mojave counterparts - an unmodified flamer has a capacity of 100 fuel units, as opposed to earlier models' 60, and through weapon modifications, this capacity can be quadrupled up to 400 units. The flamer is considered a heavy weapon and as such benefits from relevant perks such as Heavy Gunner.

None of the flamer's modifications require a perk before they may be made.

Weapon modifications

Slot Mod Description Weapon prefix Damage per shot change Fire rate change Range change Accuracy change Magazine capacity (shots per reload) change Weight change Weapon value change in caps Perk needed Components Base ID
Tank Standard tank Standard. Flamer Adhesive x3
Screw x3
Steel x8
Napalm tank Superior damage. Napalmer +4 +7.1 +59 Adhesive x4
Aluminum x8
Copper x2
Screw x3
Barrel Standard barrel Standard. Adhesive x2
Asbestos x1
Screw x2
Steel x4
Long barrel Increased reach. Extended +2.2 +28 Adhesive x3
Asbestos x2
Screw x3
Steel x8
Propellant tank Standard propellant tank Standard. Adhesive x2
Screw x1
Spring x2
Steel x4
Large propellant tank Better ammo capacity. Reduced reload speed. High capacity large +100 +2.6 +28 Adhesive x2
Screw x2
Spring x4
Steel x6
Huge propellant tank Exceptional ammo capacity. Inferior reload speed. Maximum capacity huge +300 +5.6 +34 Adhesive x2
Gears x2
Screw x2
Spring x4
Steel x6
Nozzle Standard nozzle Standard. Adhesive x4
Asbestos x1
Steel x2
Compression nozzle Better damage. Reduced range. Compressed +2 -24 -0.2 +22 Aluminum x3
Asbestos x2
Steel x5
Vaporization nozzle Superior damage. Inferior range. Vaporizing +4 -36 +47 Adhesive x7
Asbestos x4
Steel x5




  • The first shot using V.A.T.S. generates only a single tick on the critical meter, but the second shot generates several ticks at once, potentially filling the critical meter in an instant.
  • Shots using V.A.T.S. do not deal the amount of damage displayed instantly since it deals damage over time.
  • The long barrel modification is implemented such that, in the game, it must be applied last to increase the range after a custom nozzle is selected.

Behind the scenes

With Fallout 4, Bethesda designers moved away from using the "backpack ammo" design for heavy weapons, such as the flamer and minigun. Although a backpack of ammunition would be more realistic, considering the amount of ammunition that would be lugged around for heavy weapons, they found that the backpacks limited them in their costume and armor design.[1]


Flamer icon.png



  1. The Art of Fallout 4, p. 236: "FLAMER
    We went away from using backpacks for our heavy guns, such as the flamer and the minigun. Although they're realistic given the amount of ammo you'd lug around, the backpacks really limited us in our costume and armor design."
Community content is available under CC-BY-SA unless otherwise noted.