Z-Parts Forged Upper Receiver for Tokyo Marui M4 MWS GBB Airsoft Rfile

Z-Parts Forged Upper Receiver for Tokyo Marui M4 MWS GBB Airsoft Rfile Metal Construction Airsoft Receiver Design For Upgrade The Original Receiver Parts More Durable Suitable For Tokyo Marui M4 MWS Gas Blow Back GBB Airsoft Rfile