PolarStarJACK Conversion Kit-V2 M4

PolarStarJACK Conversion Kit-V2 M4

Ultra-Compact Drop-In Performance. Blistering ROF. Proven PolarStar Reliability.

Upgrade your primary rifle with the legendary speed, air efficiency, and rock-solid reliability of the PolarStar JACK HPA Engine. Designed as an accessible, high-performance electro-pneumatic drop-in conversion, the JACK replaces your AEG gearbox’s internal cylinder assembly to deliver instant trigger response and pinpoint FPS consistency.

Utilizing a single-solenoid, centre-line design, the JACK minimizes moving parts to maximize durability and air efficiency. Whether you are running tight CQB arenas or stretching out long-range shots in woodland skirmishes, the JACK provides effortless velocity adjustment and fire-rate customization through the included PolarStar Micro FCU.

Variant Options Available

V2 Platform (M4/M16/AR-15/MP5):

Includes the V2 nozzle, switch board, and wire harness designed for seamless drop-in installation into standard Version 2 AEG gearboxes.

V3 Platform (AK-47/AK-74/G36/AUG):

Includes the V3 nozzle, offset trigger switch board, and specialized V3 wire harness for Version 3 AEG gearboxes.

Key Features

• Ultra-Compact Centre-Line Design:Direct cylinder replacement housing fits into almost any standard AEG gearbox shell with minimal fitting.
• High-Speed Single-Solenoid Performance:Engineered with only one moving part (the nozzle), maximizing air efficiency and reducing potential failure points.
• Full FCU Programmability:The included PolarStar Micro FCU allows instant adjustment of Rate of Fire (1–30+ RPS), Nozzle Dwell, and Burst firing modes on the fly.
• Tool-Less Velocity Tuning:Adjust your muzzle velocity (FPS) instantly by altering your HPA regulator pressure, no spring swaps or teardowns needed.
• Open-Bolt Operating System:Delivers lightning-fast initial trigger response for instant shot placement during high-speed engagements.
• Broad Pressure Range:Operates smoothly across 40 to 130 PSI to easily adapt to strict field energy limits.

Technical Specifications

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