Modify AOE Cylinder Head+Piston ver.2

New set AOE Cylinder Head & Piston
light weight model with noise absorbing rubber pad
CNC coonstruction with hard anodized surface
duoble oring for max air seal
better air floss and accuracy
10 steel teeth and AEO technology piston
hi speed grease holder rails with double groove
the redesigned teeth shape match the perfect Angle Of  Engagemenmt with the gear rack
encreasing the gearbox parts life
fits marui and compatibles m4/m16/g3/mp5