G&P High Air Seal Airsoft AEG Piston Head O-Ring (One)

After hundreds and thousands of shots, a piston head's o-ring will wear off, especially being in a hard-to-lubricate area. You can either replace the entire piston head, or the o-ring! For Better Air Seal, Performance and Durability. Fits all stock and ball bearing A.E.G. piston heads. Fits all polycarb & stainless piston head. Manufacturer: G&P