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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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Great for people wanting to hop to hpa its efficient and it's cheaper then most but pack a punch like the upper tier HPA units
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Posted 5 years ago
I got the jack as my first Hpa engine and I absolutely love it
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Posted 6 years ago
I always buy at amped for my hpa needs, the player package is the way to go. Able to save a about 15% by buying the while package comparing to buying everything separate. Shipping + handling could be faster but great service by these guys.
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Posted 6 years ago
The jack player kit was awesome came with everything I could possibly need, now I’m the god of woods play with my buddies and their aegs. Can’t thank the amped staff enough too for their help in picking what is right for me and the custom igl. Thanks, I would definitely recommend amped and their products to others
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Posted 6 years ago
the polarstar jack unit was a very easy install and in about 20 minutes i went from a normal v2 gearbox to a hpa system. the product works very well and is pretty efficient as i can play a whole day on a 48/3000 tank . i would say if you are in the market for a hpa unit and consider the jack get it and you will never look back.
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Posted 8 years ago
the polarstar jack unit was a very easy install and in about 20 minutes i went from a normal v2 gearbox to a hpa system. the product works very well and is pretty efficient as i can play a whole day on a 48/3000 tank . i would say if you are in the market for a hpa unit and consider the jack get it and you will never look back.
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Posted 8 years ago
Great product that runs very smoothly. Make sure your gun is compatible before purchasing it. It fit in my g&g perfectly but I didn't screw in the trigger board correctly. Make sure to take your time when installing it because if something is out of place you will run into a lot of problems. The fcu is very nice and tuning it was very easy. Very good product and I am thinking about buying a second one :)
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Posted 8 years ago
It was a bit difficult to install by myself, but I eventually got it installed. At first I thought I got a faulty unit as it didn't shoot properly but after fiddling with the FCU I got it working just fine. I highly recommend purchasing this product.
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Posted 9 years ago