Polarstar JACK HPA Version 3 Conversion Kit w- REV3 FCU spring rifle peer through the included 4x32

peer through the included 4x32 scope

It features a metal receiver and microswitch trigger for fast engagement

or 25 rounds per second

This feature enables the user to install an optional 90 degree fitting inside of their engine allowing the air line to be routed to the rear of the engine and exit through the buffer tube sling plate on an M4 series rifle

Bullet drop compensator calibrated for the

Polarstar JACK HPA Version 3 Conversion Kit w- REV3 FCU spring rifle peer through the included 4x32Description: Polarstar JACK HPA Version 3 Conversion Kit 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