G&P MWS CNC Barrel Extension for Tokyo Marui M4A1 MWS GBB Rifle

G&P MWS CNC Barrel Extension for Tokyo Marui M4A1 MWS GBB Rifle Brass Construction Suitable For Tokyo MArui M4A1 MWS Series Gas Blow Back GBB Rifle Designed to allow your outer barrel to be extended slightly for other barrels or just giving the gun that slight addition to length.