SHS half teeth hard piston for electric guns

New model made of hi strenght polymer and steel teeth
hi speed and resistance with thermal treatment steel
the rail portion is ideal for hi speed or power spring
side drilled to reduce the surface friction and the weight of the whole piston
rear cut slot for blowback piston recoil
tempered half teeth rack gear installed, ideal for standard or infitnity torque gear set
for marui, g&g, g&p, vfc, ka aeg and compatible