Silverback Aluminum 16 Teeths Piston For MDRX Airsoft Rifle

Silverback Aluminum 16 Teeths Piston For MDRX Airsoft Rifle CNC Aluminum Construction Airsoft Piston ( Hard Anodized Coat) Design For Upgrade the Original Airsoft Internal Parts More Durable With a Hardened MIM Steel 16 Teeth Rack Suitable For Silverback MDRX AEG Electric Gun Airsoft Rifle