PolarStar Airsoft F1 HPA Electro Pneumatic System with Full Size FCU for M4/M16

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If your M14 or M16 needs a revamp, this PolarStar electro-pneumatic system may do the trick. This product was designed to enhance the performance and longevity of your weapon with many nifty features.

The strongest suit of the system might be the construction. Since it’s made of robust aluminum alloy, the item is as durable as they come. It’s also reasonably lightweight to help ensure your gun doesn’t slow you down on the battlefield.

The same goes for the Delrin air nozzle. It’s lightweight and durable, promising excellent performance during skirmishes.

Another great thing about the product is the addition of FCU. It enables you to change your rate of fire conveniently and comes with several selector mode adjustments. The system boasts 2-9-round burst capability.

You also get a well-designed dual-purpose flow control mechanism. It enables you to regulate the nozzle speed effectively and activate two-stage firing. The result is smoother chambering and an increased cyclic rate.

Complementing the robust body and advanced firing mechanism is a fully functional custom solenoid. This MAC-manufactured model makes the item more efficient and compact.

Furthermore, you shouldn’t have any issues maintaining this piece. The tool-free design allows for easy access to all critical components. The moving parts are reliable, and cleaning them doesn’t take much skill.

Finally, the PolarStar electro-pneumatic system is highly versatile. It works great with most M4/M16 version 2 gearboxes. It’s also recommended for use with 7.4V-8.4V batteries.


  • Machined Aluminum Alloy for Premium Strength and Lightweight
  • FCU for Easy Rate of Fire Selection
  • 2-9-round Burst
  • Dual-purpose Flow Control
  • Fully Functional Custom Solenoid
  • Easily Accessible Parts
  • Compatible with M4/M16 Version 2 Gearboxes
  • Color: Blue and Silver
  • Length: 4 Inches
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