PolarStar JACK HPA Conversion Kit (V2 / V3) Style:V2/M4 0 replica is available in

0 replica is available in clockwise and counter-clockwise 14mm threading

•    Compatibility – 1913 Picatinny Rails

aggressive 7″ MLOK handguard

steel loading nozzle for enhanced durability

PolarStar JACK HPA Conversion Kit (V2 / V3) Style:V2/M4 0 replica is available inThe 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