RA Tech NPAS Cylinder Bulb Kit For Tokyo Marui M4 MWS GBB Airsoft

Key Feature CNC Aluminum Construction Airsoft Cylinder Bulb Kit (Durable anodizing) NPAS (Negative Pressure Air System) Allows easy adjustment of gas output (FPS) Suitable For Tokyo Marui M4 MWS Gas Blow Back GBB Airsoft Rifle