[L473ncy]

That chart is old but still pretty good. I talked to Illusion and he isn't going to be updating it because of too many things to do (I may do it in the future when I have some time but who knows when that will be between a job, school, and student loans).

I'd say that you should try and go with a Modify S110 to get around 380 or whatever it is (that is unless you have another spring that came with the gun).

NOTE THAT YOU SHOULD WATCH A FEW VIDEOS OF HOW TO CHANGE THE SPRING BEFORE YOU DO THIS FOR THE FIRST TIME. Or ask a gundoc to show you how it's done (Also if they're willing to do it for free it might be a good idea to bring a pizza and a 6 pack).

Also at such a high FPS the gears will likely strip (even if they are torque up gears) I highly doubt that they are good enough to withstand such high forces. So Modify S120 and S110 are exactly what you should be looking for.