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PolarStar Jack V2 HPA Unit | Standard FCU | V2 M4 HPA Kit Reviews

4.7 Rating 68 Reviews
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PolarStar Jack V2 HPA Unit | Standard FCU | V2 M4 HPA Kit
The Polarstar “JACK” was designed to answer the demand for an affordable, high performance HPA conversion for AEG's. The system is a drop-in cylinder replacement that will be universally compatible with a wide range of gearbox versions that have center-line nozzles.
Similar to its sister product, the F1, it 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, “JACK” will still retain the same performance and quality you have come to expect from PolarStar.The JACK system only has 1 moving part, the nozzle, that acts as its own poppet valve (similar to the Fusion Engine poppet) which is piloted by the solenoid. The system itself only has 6 parts and can be completely disassembled by hand, making the system very reliable and easy to maintain.
The JACK is extremely efficient. The patent pending design of the F1 allows for the most direct air path to the nozzle with minimum dead volume resulting in better flow, faster response and less air used per shot. Using a stock VFC M4 as a test platform, the JACK was able to fire approximately 1000 rounds for a 13ci/3000psi cylinder before pressure dropped below regulated output.
Features:
CNC aluminum components with high performance delrin nozzle
Universal cylinder design allows for use with most gearbox versions
Optimized air flow promotes consistency and accuracy.
Adjustable velocity and cyclic rate w/ FCU
High performance and reliability, even in sub-freezing weather
FCU programmable Semi Auto, Full Auto, and Burst modes
Airsoft Polarstar JACK ECU / FCU included 
 
Tech Specs:
Nozzle Type: TM M4 SeriesRate of Fire: Up to 30RPS+ (The maximum cyclic rate of the Jack is affected by several factors, however, 30 rounds per second is a conservative number. Most configurations will exceed this easily.)Air Efficiency: 1000 shots from 13/3000 @ 1.5J (80PSI w/ .28g) Fire Modes: Semi Auto, Semi Only, Full Auto, Variable Burst ModesPSI Range: 40 PSI - 130 PSI * Do not exceed for risk of damagePackage Includes: Pre-Assembled JACK Conversion KitBattery: 7.4v-9.6v NiMH or Lipo (Not included).
Need an IGL Line? Check our our Amped IGL lines:AMPED - IGL (For Wolverine SMP & PolarStar JACK)
Did you know we had our own AMPED Jack?PolarStar - Amped JACK (V2/M4)

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KGROGACHEV​
Verified Reviewer
I recommend buying to her Madbull Red Shark! There were some alignment issues. But everything was decided by adjusting the gearbox
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Posted 1 year ago
That's wonderful! Thank you for the review! :)
Posted 1 year ago
First polarstar kit, very satisfied
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Posted 1 year ago
That is great to hear! Thank you for your feedback! :)
Posted 1 year ago
Author didn't leave any comments.
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Posted 1 year ago
Thanks!
Posted 1 year ago
Awesome hpa and unit for hpa beginners.
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Posted 1 year ago
Thank you for the review!
Posted 1 year ago
Just amazing
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Posted 1 year ago
Awesome!
Posted 1 year ago
Trigger response is much better than an AEG. The full auto is amazing. Pairs perfectly with a speed trigger and the amped igl! Great product!
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Posted 1 year ago
Thanks!
Posted 1 year ago
Everythig was nice but the nozzle got stuck it may need to lubed more
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Posted 1 year ago
That, or check for any kind of debris!
Posted 1 year ago
Love this thing, easy install, good performance, overall recommend this to anyone trying to convert to hpa.
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Posted 1 year ago
Thank you!
Posted 1 year ago