A cool product from FFactory for the Tokyo Marui M4A1 MWS Gas Blowback Rifle is in stock at Laylax. The FFactory Tokyo Marui M4A1 MWS 8-Way Outer Barrel allows you to configure your MWS into 8 different lengths with the longest being 12.5 inches and the shortest being 4-inch. This will allow you to install different types of rail systems as you please. Rail hanguards and inner barrels not included in this package.