Hey I've been looking at this and watched a couple videos on it and was wondering what everyone thought of it? It's the Modify Tremors Recoil Kit and you are able to put it through your standard AEG (probably with a better piston etc) and through your buffer tube and it will add recoil you can feel. I personally think that's pretty awsome. And it seems that the design of it puts minimal stress on the gearbox