The High Bullet valve is a fancily titled high flow valve; by mechanism of delivering more gas per shot, this valve will draw more power for each shot taken resulting in a higher FPS in the same rig. The draw back to any high flow is reduced gas efficiency of course but for some that is a small price to pay for the turbo charged power of such technology.
Fits Tokyo Marui MP7A1
The Nine Ball High Bullet Valve Neo, not for the feint of gas reservoir.