Pulsefire® UBF: Because we can.

Diagram of Pulsefire UBF attached to blue AR type rifle with the words Possible Modifications in the upper left

an underbarrel flamethrower?

We know what you’re thinking – who wouldn’t want a flamethrower that attaches to a picatinny rail?

And that, my friends, is the exact thought process that led us here. Since the introduction of the Pulsefire® LRT in 2019, Exothermic Technologies has continued to innovate and optimize. In 2022, we are bringing yet another incredible concept to reality with the Pulsefire® UBF (underbarrel flamethrower).

Is it legal?

The great thing about being a free citizen living in the United States (aside from Maryland, California, and the city of Warren, MI) is that it’s absolutely legal for you to buy a flamethrower. At its core, it is simply a long range torch – a handheld lighter with a slightly longer than usual flame.Map of the United States depicting Maryland in red and California in beige.

How do you mount the Pulsefire® UBF to a gun?

A simple lever activated clamp mounted to the top of the UBF secures the rear handle in any number of positions. It just so happens that the handle assembly uses the MIL-STD-1913 profile. Thus, you can clamp it onto any common picatinny rail.

Diagram of the Pulsefire UBF highlighting the picatinny clamp and handle assembly.

If it’s mounted to a gun, how do you refill it?

Use that quick detach lever clamp and un-mount it from the gun. Lay it on its side and extend the built-in kickstand, which keeps the tank as level as possible, letting you fill things up to the brim safely and efficiently.

Pulsefire UBF laying on its side, fuel cap off, with kickstand extended.

The UBF can also use the Pulsefire Backpack Kit.

With a simple male-to-male adapter (included with the backpack kit), you can easily connect the hose from the Pulsefire UBF to the backpack reservoir, boosting your ability to emit fuel and flames to over 4 minutes.

Diagram of Pulsefire UBF, adapter fitting, and backpack kit hose.

First look (and flames) from Springhill Outfitters:

Trent showcases the all-new Pulsefire UBF and lays down some firepower.

DEGuns shows what happens when you cross the streams:

What happens when you cross a Pulsefire® LRT and an AR15? A spectacle of freedom.


Pulsefire UBF.


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Pulsefire® UBF (Underbarrel Flamethrower)

The patent-pending Pulsefire UBF is the first commercially available underbarrel flamethrower.

Be sure to sign up for the waitlist to be notified when stock becomes available!