Modify Polycarbonate Full Tooth Piston

It is lightweight, tough and has high impact-durability. *Economic version available Material: Polycarbonate. Modify Piston metal tooth is made of wear-resisting alloy steel via special technique unlike the conventional ones. It has high durability against high speed operation and heavy load of the gears. It suits to all the mainstream upgrades for Tokyo Marui AEG's and has an excellent performance. *econ.version = not including the steel tooth