SAT Technical Knockout System Upgrade Kit for Tokyo Marui M4
Are you looking for a power and gas efficient upgrade for your Tokyo Marui M4 GBB rifle? Then this is something that you should definitely have! SAT's Technical knockout System upgarde kit for the Tokyo Marui M4 increases the overall gas flow rate but will only release a certain amount each time making the fps relatively similar with each shot till the magazine runs out! In turn, it increases the muzzle velocity and improves the shooting experience!