PolarStar JACK AK Gearbox HPA Electronic Pneumatic Conversion Kit, Black

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Transform your AK airsoft rifle into a high-performance powerhouse with the PolarStar JACK AK Gearbox HPA Conversion Kit. Engineered by PolarStar, a trusted name in airsoft innovation, this conversion kit takes your AK to the next level of performance and reliability.

The PolarStar JACK AK Gearbox HPA Conversion Kit features an AK nozzle type and is designed for use with HPA (High-Pressure Air) propellant. Constructed from durable aluminum alloy, this conversion kit ensures long-lasting performance and durability in the field. The sleek black finish adds a tactical and stylish touch to your AK rifle.

Experience the benefits of the electronic pneumatic system provided by the PolarStar JACK AK Gearbox Conversion Kit. This conversion kit replaces the traditional gearbox components with a programmable pneumatic system, offering enhanced reliability and performance. With the JACK AK Gearbox, you'll enjoy consistent and precise shot delivery, improved trigger response, and customizable settings to suit your playing style.

The PolarStar JACK AK Gearbox HPA Conversion Kit is designed to be compatible with AK airsoft rifles, bringing the advantages of HPA technology to your favorite AK platform. Take advantage of the reliability and consistency of HPA propulsion, allowing you to dominate the battlefield with increased accuracy and performance.

Upgrade your AK airsoft rifle today with the PolarStar JACK AK Gearbox HPA Conversion Kit. Shop at Airsoft Station and elevate your gameplay and experience the power of precision and reliability. Trust PolarStar to deliver top-notch airsoft performance and take your AK to new heights.


  • Affordable and efficient HPA conversion for AEGs by PolarStar
  • Universal compatibility with a wide range of gearboxes thanks to the easy switch-out nozzle
  • Reliable and low-maintenance engine with a single moving part
  • Adjustable muzzle velocity from 250 to 500 FPS for enhanced versatility
  • Max velocity potential influenced by barrel length and bore tightness
  • On-board FCU (Fire Control Unit) for convenient adjustments to cyclic rate, fire modes, and poppet dwell
  • Improved BB stabilization in the hop-up unit for enhanced accuracy
  • Compatibility with various stock and aftermarket options for improved hop-up performance
  • Replaces original gearbox parts with a programmable pneumatic system for superior reliability
Aluminum Alloy
Power Source:
Package Includes:
1x Jack Engine, 1x FCU
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