G&P Blank MWS Forged Aluminum M4 Receiver Set w/ Hop-Up Chamber for Marui M4A1 MWS GBB

G&P Blank MWS Forged Aluminum M4 Receiver Set w/ Hop-Up Chamber for Marui M4A1 MWS GBB Aluminum Construction CNC Quick Release Hop Up Chamber (Patented) CNC M4 Receiver Assemble Pin Set (Black) (MWS) Suitable For Tokyo Marui M4A1 MWS Series Airsoft Gas Blow Back GBB Rifle