The KSG from Tokyo Marui was a brilliant platform that is the first practical bullpup pump-action gas powered shotgun that utilizes the Tokyo Marui 3/ 6 shot system, but it had a short coming, the power is quite weak out of the box because it has to push multiple BBs at the same time, the new SAT High Performance Output Valve increases the power output of each shot, which helps to bring a higher effective engaging distance of the gun. Made from billet aluminium also means it would be more durable than the original zinc metal valve.