[Boyso]

Well, I've been trying everything, and I'm having a real hard time figuring this issue.

Basicly, with a Modify S110 spring, I'm getting 150 fps (With my Xcortech 3200).

I tested the compression parts of the gearbox, and I'm getting perfect airseal (ARS Mask kit 2G cyl. head, Modify nozzle, Modify piston head & piston, Modify Cylinder, stock JG tappet plate). I sanded the front of my tappet plate a bit also.

Now, my hop up is a Madbull ultimate with a Madbull bucking, and a Madbull tighbore. I added a layer of teflon tape on the outside of the hopup where the Cclip is, just to make sure.

So I do believe the leak is within the Nozzle -> Hopup, as there is a bit of friction between the hopup and the upper receiver. I file down the "wings" on the side of the hopup, but it doesn't seem to help much. The hopup seems to touch the gearbox.

I've heard the bucking was crap, but could it be the only reason for such a low FPS? I was getting 315 fps with my S90 spring before, and the new spring is much stiffer, so I doubt it could be the spring being a lemon.

Thanks for watching.