The JACK™ was designed to answer the demand for an affordable, high performance HPA (High Pressure Air) conversion for AEG’s. The system is a drop-in cylinder replacement that is universally compatible with a wide range of gearbox versions that have center-line nozzles.

Similar to its sister products, the JACK™ replaces the original gearbox components with a programmable pneumatic system allowing for higher performance and greater reliability over a gear driven system. Although economically priced, the JACK™ still retains the same performance and quality you have come to expect from PolarStar products.

The JACK™ has only one moving part, the nozzle, which acts as its own poppet valve. Similar to the Fusion Engine™ and F2™ poppet, the nozzle is only piloted by the solenoid to open air flow through the poppet with none of the firing air coming from the solenoid itself. This design lets the JACK™ send a higher flow of air down the barrel than systems that only use a solenoid as the firing valve.

Specifications

• Manufactured by PolarStar
• Velocity can be adjusted from 280 to 500 fps using 0.20g BB, with varying barrel length further affecting FPS result
• Assembled from CNC machined aluminum
• Universal cylinder design compatible with many gearbox
• Capable of functioning in damp and cold climate without affecting performance or reliability
• Easy to use FCU with LCD display
• Instantaneous trigger response
• Compatibility for CA/A&K M249 Gearbox
• PSI operating range of 40 to 130
• Fires in semi, 2 to 9 rounds burst and full auto
• Requires a 7.4v LiPo or 9.6v NiMH battery, not included

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