Pulsefire UBF Underbarrel Flamethrower
We engineered the Pulsefire UBF for operators who need compact flame projection without sacrificing firepower. This underbarrel flamethrower mounts securely to Picatinny and M-LOK rail systems, delivering controlled 25-foot flame streams in a lightweight tactical package.
The pulse fire ubf weighs just 4.2 pounds empty and integrates seamlessly with your primary weapon platform. Our proprietary fuel delivery system ensures consistent ignition and burn duration shot after shot, while the ambidextrous trigger provides instant activation for right- or left-handed operators.
UBF specifications & tactical details
Rail Mounting & Weapon Compatibility
The Pulsefire UBF attaches to any standard Picatinny or M-LOK rail forward of your primary weapon’s trigger guard. We designed the quick-detach lever to withstand 800 pounds of lateral force, ensuring your pulse fire ubf stays locked during dynamic operations.
Installation & Positioning
Mount the UBF 6-8 inches forward of your support hand position for optimal weight distribution and trigger access. The system works with AR-15, AR-10, AK-pattern rifles, and most tactical shotguns with compatible rails. Our low-profile design maintains your weapon’s center of gravity while adding minimal bulk.
Fuel System & Ignition Technology
We use a pressurized liquid fuel reservoir that holds 12 fluid ounces of our proprietary Pulsefire fuel blend. This translates to 8-12 activations depending on burn duration, with each trigger pull delivering 3-5 seconds of continuous flame projection.
Piezoelectric Reliability
The pulse fire ubf eliminates traditional battery-powered ignition systems. Our piezoelectric spark generator produces 15,000-volt ignition with zero external power requirements, rated for 50,000+ cycles before service. The fuel delivery valve opens in 0.08 seconds, ensuring immediate flame on every activation.
Construction & Durability Standards
We machine every UBF body from 6061-T6 aircraft aluminum with Type III hard anodizing for corrosion resistance and heat dissipation. The fuel chamber withstands internal pressures up to 150 PSI with a 3:1 safety factor, exceeding DOT portable fuel container standards.
Heat Management
The nozzle assembly features a ceramic heat shield rated to 2,400°F, protecting your primary weapon’s forend during extended use. After a full 5-second burn, the outer housing reaches just 110°F—cool enough to maintain contact without gloves.
Expand Your Pulsefire Arsenal
Rated 4.8 by verified buyers
Pulsefire UBF Technical Questions
The UBF works with all standard Picatinny (MIL-STD-1913) and M-LOK rail systems. We include both mounting adapters in the box.
The quick-detach clamp fits rails from 0.75 to 1.5 inches wide, covering AR-15, AR-10, AK-pattern rifles, and most tactical shotguns with accessory rails. For KeyMod or proprietary rail systems, our separate adapter kit provides additional mounting options.
Each 12-ounce fuel load delivers 8-12 activations depending on your burn duration. A full 5-second continuous burn consumes approximately 1 ounce of fuel.
Most operators use 2-3 second bursts for tactical applications, which extends capacity to 10-12 burns per fill. The integrated pressure gauge shows remaining fuel level in real-time, so you'll always know when to refuel before running dry.
The UBF uses our proprietary Pulsefire fuel blend, a pressurized liquid hydrocarbon formulated for consistent atomization and clean combustion. Each canister is pre-pressurized to 50 PSI for optimal performance.
We strongly recommend against using automotive gasoline, kerosene, or diesel fuel, as these have incorrect vapor pressures and can damage the fuel delivery system. Our fuel canisters include quick-connect fittings that mate directly to the UBF fill port for safe, spill-free refueling.
No external power needed. The pulse fire ubf uses a piezoelectric ignition system that generates its own high-voltage spark through mechanical trigger action.
This eliminates battery maintenance and ensures reliable ignition in extreme temperatures where batteries fail. The piezo crystal is rated for 50,000+ ignition cycles—enough for years of regular use before requiring factory service.
The Pulsefire UBF projects flame effectively to 25 feet under calm conditions. Wind above 10 mph will reduce range and deflect the flame stream, so always account for environmental factors.
Each trigger activation delivers 3-5 seconds of continuous burn depending on fuel pressure and nozzle selection. The wide-dispersal nozzle creates shorter, broader patterns around 20 feet, while the focused stream nozzle reaches the full 25-foot range with a tighter flame cone.
Yes, the UBF adds just 4.2 pounds and maintains a low profile that won't interfere with your primary weapon operation. The safety selector locks the trigger in SAFE mode, preventing accidental activation during normal shooting.
Many operators leave the UBF mounted as a permanent accessory. The quick-detach lever allows removal in under 5 seconds if you need to reduce weight or switch configurations. The ceramic heat shield protects your rifle's handguard even if you fire your primary weapon immediately after a flame activation.
After every 50 activations, remove and clean the nozzle assembly with the included brushes to prevent carbon buildup. Inspect all O-rings for wear and replace them every 200 cycles or annually, whichever comes first.
Lubricate the quick-detach mechanism quarterly with our provided thread-locking compound. Store the UBF depressurized with the fuel tank empty when not in use for extended periods. Full maintenance procedures are detailed in the operator's manual, and replacement O-ring kits ship with every unit.