Yeah, I am 100% sure, I own a KJW M700. They feel that tightening the screw will increase FPS, however, it just causes the striker spring to become further compressed so that when you fire, it hits the valve on the magazine harder, releasing more gas. If you loosen it all the way, it will not fire anymore. Why do you need it to shoot hotter anyway? You can only use it up to 500FPS, and you have to use 134a to do that. Adjusting the screw is inconsistant and just gimmicky.