G&P MWS Forged Aluminum M4 Upper Receiver w/ Hopup Chamber (Cerakote Black Finish) for Marui M4A1 MWS GBB Net-Weight-(g)_1250 CNC machined metal keymod rail

CNC machined metal keymod rail

In addition its specifically designed to cope with the harsher weather in Winter

The set is slated to work with both stock and aftermarket upgrade parts designed for the MWS which makes this receiver set a great upgrade part for MWS users

As a Co2 Pistol with fully automatic function is barely seen in the market

G&P MWS Forged Aluminum M4 Upper Receiver w/ Hopup Chamber (Cerakote Black Finish) for Marui M4A1 MWS GBB Net-Weight-(g)_1250 CNC machined metal keymod railG&P MWS Forged Aluminum M4 Upper Receiver w Hopup Chamber (Cerakote Black Finish) for Marui M4A1 MWS GBB Aluminum Construction (Black Cerakote finish) Cerakote finish For better resistance to the elements and or potentially corrosive chemicals. Design For Upgrade the Original Parts More Durable Comes with a hop up chamber to further maximize the performance of the rifle Suitable For Tokyo Marui M4A1 MWS Series Airsoft Gas Blow Back GBB Rifle