Polarstar F2™ HPA Conversion Kit M4

Bite Sized Fusion Engine

Winner of the “Best HPA Engine” at the 9th Airsoft Players Choice Awards, the F2™’s dual-solenoid design offers the same functionality as the legendary Fusion Engine™, but in a more compact, efficient and flexible design. The dual solenoids allow the nozzle and poppet valve to be adjusted independently, providing unparalleled control over both load time and volume of air used. Additionally, it allows for changing the firing sequence, allowing the system to operate in both true closed bolt mode and “AEG” mode. (PolarStar Filter Fitting now included)

The F2™ incorporates a new, lightweight, one-piece poppet valve design while still operating on the same principle as the Fusion Engine™ poppet. This valve can operate at lower pressures and uses less air volume, resulting in optimized air efficiency.

The robust design allows for an operating pressure range of 45psi to 145psi, allowing the F2™ to reach speeds from CQB to DMR without the need for multiple nozzles for the full speed adjustment range.

Additionally, the nozzle is spring-loaded forward, which provides consistent loading force regardless of operating pressure. The F2™ shares the same spring as the Fusion Engine™, with both light and heavy spring options to customize loading force.

Compatible with Gel Ball

F2 HPA conversion kits can also be configured for use in gel ball systems.
Please contact us for more information about ordering F2 systems for gel ball use.

Gel Blaster F2 Specifications

• Velocity: 480fps with .20g BB at 145psi
  The F2™ allows for easy velocity adjustments by simply changing the feed pressure, without the need for different nozzles. On a standard M4, velocity can be adjusted from less than 280fps to approximately 480fps with a .20g BB. Velocity can vary by model; longer barrels increase maximum velocity, while shorter barrels decrease it.

• Rate of fire: 30 rps
  The maximum rate of fire of the F2™ is affected by several factors, such as workload and the quality of the magazines and BBs used. However, 30 rounds per second is achievable in most standard configurations.

• Air Efficiency: 1000+ shots from a 13/3000 tank at 1.5J with .28g BB
  The standard F2™ poppet valve is similar to the Fusion Engine™ Red Low-Flow poppet. However, this valve is more responsive and uses less air volume, allowing the F2™ to achieve greater air efficiency than even a finely tuned Fusion Engine™.
  (Test configuration: Red Poppet / 6.05x375mm barrel)