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CODE NAME "SIMPLE JACK"
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. The JACK still retains the same performance and quality you have come to expect from PolarStar.
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.
angel
Reviewed in the United States on January 19, 2024
Have had no issues whatsoever works great easy to maintain
Edward
Reviewed in the United States on October 25, 2023
This is a great addition to my gun! It was a learning experience I will never forget. If you have a Valken v2 gear box this won’t fit. I had to use a g&g gear box and then was successful. I’m getting the krythera nest to try with the Valken gear box.
John L.
Reviewed in the United States on April 27, 2023
Careful of polarstar products, horrible interaction with their customer service on brand new item.Bought brand new kythera, hooked it up to air, leak out of the nozzle. Disassembled it, re-lubed everything, still a leak. Call customer support, told to look for defects, find 2, big scratch on inside of cylinder and some kind of warping on the inner-nozzle. Two week turnaround for RMA and they want to make sure that it’s their defect…and I’d pay for repairs if they deem it wasn’t their fault. Not gonna stick around and find out on that one.
meriss
Reviewed in the United States on November 15, 2022
I was skeptical about which one to choose when it arrived i was very pleased.Very good quality. Easy to install.I'm very happy with this product.Product works as intended.
Jesse P.
Reviewed in the United States on December 31, 2021
The jack is amazing, pros: easy to install, easy to set up, easy to tech, easy to use.Cons: no foster fitting, 6mm grip line, micro line.This jack can be set to 99 rounds per second.
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