Hey ! Thanks for taking the time to know my problem !
So I was coding smaller units for my Mod (you know all the stuff with Scale = 0.2) and it was working perfectly. However, I just forgot about one small detail... My tiny archers are throwing 5 times bigger arrows than they should so I tried to fix it... I visited the particlesystem and fxlist but did not find anything concerning the arrows.
So if you know how I could re-scale the arrows, thanks for telling me ! ^^
Again, thanks for taking the time to help me !