PolarStar JACK Electro-Pneumatic Gearbox Conversion Kit V3 AK gemtech Have peace of mind when

Have peace of mind when you’re on the field knowing that your SS Line is hand-made and tested in the United States of America

CNC aluminum handguard

aim at your target

Three output modes: momentary on

KAC Micro Sights/Metal Outer Barrel Construction: 10

PolarStar JACK Electro-Pneumatic Gearbox Conversion Kit V3 AK gemtech Have peace of mind whenThis JACK is for Version 3 gearboxes if you are in need of a JACK that is compatible with Version 2 gearboxes CLICK HERE The JACK system 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 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