The JACK™ system 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 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™ still retains the same performance and quality you have come to expect from PolarStar products - See more at: http://polarstarairsoft.com/products/jack.html#sthash.O0JwDBi2.dpuf
|Fire mode/s||Full Auto, Semi Auto, Variable Burst|
- See more at: http://polarstarairsoft.com/products/jack/jack-v2-m4.html#sthash.DrDTta1q.dpuf