JACK / F2 BV309A Bullet Valve T-Shirt but in a modular configuration

but in a modular configuration that has been designed to fit all Milspec stocks as well as most AEG stocks

With the PolarStar UGS™ (Universal Gas Stock) you can now get the performance advantage of a HPA system without needing to be tethered to a remote air rig and still retain the likeness and function of a traditional adjustable stock

A PolarStar Airsoft Gift Certificate lets them choose from our premium selection of airsoft engines

• UPF 50+ protection

JACK / F2 BV309A Bullet Valve T-Shirt but in a modular configurationThe BV309A Bullet Valve is the solenoid used in all current production F2 and JACK HPA systems and it is backwards compatible with all F2 and JACK systems previously made. Power lead is included with the valve and also available separately. (Power Lead part # 10000479)