RGW Aluminum Blowback Housing For SIG Sauer M17/ M18 GBB Airsoft Guns

RGW Aluminum Blowback Housing For SIG Sauer M17/ M18 GBB Airsoft Guns CNC Aluminum Construction Design For Replace the Original Parts Design For adds Extra Stability and FPS performance to your Airsoft Gun Suitable For SIG Air M17/ M18 Series Gas Blow Back GBB Pistol Airsoft Guns