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

4.7 Rating 66 Reviews
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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
Description:
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.
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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The best engine for the money! Definitely a good buy. If you want to take it to a new level just spend 30 dollars on a black leaf trigger board!
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Posted 3 years ago
Very good engine
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Posted 3 years ago
Thank you!
Posted 3 years ago
It’s amazing easy to drop In
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Posted 4 years ago
Thank you for your feedback on the Jack!
Posted 4 years ago
Great product by Polarstar and thanks to Ampedairsoft crew!
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Posted 4 years ago
Awesome! So glad to hear you love it! Hope you have a great one and stay safe out there!
Posted 4 years ago
This is a great item
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Posted 4 years ago
Ordered the polar star jack player kit and what a hell of an upgrade. Installed it in my krytac alpha crb did all the adjustments and.....WOW. It's a beast. Thanks amped airsoft for giving everything I needed to get started my hpa journey.
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Posted 5 years ago
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 5 years ago