JACK / F2 BV309A Bullet Valve Mechbox Pro This hi capa recoil spring

This hi capa recoil spring has a special heat treated finish

Dual Illuminated Green & Blue Urban Tactical glass etched reticle for Quick Target Acquisition

VFC SCAR-H

The Heckler and Koch is an authentic HK replica with Gas Blowback power

Just load up the EF Speedloader with a full charge of 470 BBs and plunge the lever a few times until your magazine if full

JACK / F2 BV309A Bullet Valve Mechbox Pro This hi capa recoil springThe 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.