Silverback Piston Head O-ring For MDRX AEG Airsoft Rifle (5pcs)

Silverback Piston Head O-ring For MDRX AEG Airsoft Rifle (5pcs) Rubber Construction Airsoft Piston Head O-ring MDRX Piston head O-ring(x5) Suitable For Silverback MDRX Series Electric AEG Rifle Airsoft Gun