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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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Affordable and super affective mechanism. The jack provides a very good experience for Speedsoft era and milsim players as well.
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Posted 2 years ago
This unit is a piece of junk. I used it 3 times and 1 the trigger board broke. 2 the FCU wire needed to be resoldered. And 3 the Whole unit broke. People, please don't waste your money. Just go buy the f2 if you want to waste your money. Thanks.
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Posted 2 years ago
We are sorry to hear that you did not have the best of luck with your Jack unit. If you need additional assistance at this point with the unit, please reach out to cs@polarstarairsoft.com for help!
Posted 2 years ago
I put this in a VFC M4 and it fit great, and performs great. Definitely worth it for the consistency and ease of use.
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Posted 2 years ago
Amazing product very easy to drop into the gearbox, worth every penny. Comes with a trigger board, wire harness, FCU, and of course the Jack. Don't forget an IGL!!!
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Posted 3 years ago
Jack is a awesome product worthwhile real snappy Is also on a Wolverine inferno He's like him both end up putting it in the black gun my zombie gun
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Posted 3 years ago
It works great just a i imagined, fast shipping as well
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Posted 3 years ago
Easy to install.
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Posted 3 years ago
This system is amazing I’ve had zero problems with it amazing shoots very well adjustable settings very good HPA unit
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Posted 3 years ago