Originally Posted by Zamadu
what is a good bb weight for 400 fps?
don't be like every other retarded noob, 400fps is a limit, it's not a goal. Play with the gun for a while before deciding if you want to upgrade the gun to do 400fps, for indoors .20g bb's are fine, for outdoor .25 would be the minimum.
You don't need to upgrade the gun right away, just feel it out and see if you even like playing airsoft at all, you might not even like the feel of the MP5 either, so give it time
400fps with .20s is the field limit for AEG's at most places in canada, 400fps with .25 is not the same as 400fps w/.20, do the math