The Modify Quantum Polycarbonate Piston w/ Metal Teeth is the ultimate solution to a strong, lightweight piston for high velocity and high speed AEGs. The polycarb body keeps the piston lightweight, which puts less strain on the gears. Also, the full metal teeth keep the piston from stripping due to stress from the gears. The polycarb body mix with metal teeth is the ultimate combination and compromise for your AEG.
The use of aftermarket airsoft parts is not an exact science. Some parts may require fitting even thought they were designed to fit without modification. Professional installation of upgrade parts is highly recommended.