newb fps question
I recently decided I was done with paintball, and so I'm getting into airsoft
last week I bought my first gun, a Echo 1 M4 Platinum.
From my understanding it shoots a little hot out of the box, around 410-425 fps
most fields seem to have a 400 fps limit, I know I need to change the spring but not much beyond that
so TL;DR my question is what spring is currently in the gun? and what one do I need to replace it with to get under 400fps?