PolarStar JACK™ HPA Conversion Kit Configuration:Ares M4 (Metal injected molding) pinion and

(Metal injected molding) pinion and bevel gears to provide the best durability for better peace of mind

Suitable for various HPA engines

Vents spread throughout the goggle to enhance breathability and hearing

Reinforced with HK Army trim

making it a great do-it-all option

PolarStar JACK™ HPA Conversion Kit Configuration:Ares M4 (Metal injected molding) pinion andCode name "Simple Jack." The JACK was designed to answer demand for an affordable, high performance HPA conversion for AEGs a drop in cylinder replacement universally compatible with a wide range of gearbox versions that have center line nozzles. PolarStar Filter Fitting included. The JACK has only one moving part: the nozzle, which acts as its own poppet valve. Like the Fusion Engine and F2, the nozzle is only piloted by the solenoid to open airflow