Originally Posted by AngelusNex
um... FPS doesn't really matter, as long as it's sub 400 (mainstream outdoor field limit)
fps determines what type of BB you use, I was just wondering if I could use 0.25g BBs, I am not sure they will fly on the same level if they are fired at 320fps.
edit: wait why would anyone upgrade your gun to fire at 600 fps if that was the case!?