Polyacetal High Pressure Plastic Construction Essential part for upgrading your Airsoft AEG The piston body is made of Plastic and the 7 teeth are made of Steel for ultra shock absorbing purpose Full Teeth Design for Regular Straight Gear Set On the side of this piston are added oil grooves to increase the smoothness and to decrease the friction when the piston operates inside a gearbox It is designed for V3 GearBox It is fully compatible with aftermarket airsoft guns using TM Gear Box
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