Pro Arms CNC Light Weight Blowback Housing Unit for SIG AIR P320 M17 / M18 GBB

Pro Arms CNC Light Weight Blowback Housing Unit for SIG AIR P320 M17 / M18 GBB CNC Metal Construction Able to Incress extra stability and FPS performance Suitable For SIG AIR P320 M17/ M18 Series Airsoft Gas Blow Back GBB Pistol