editing weapon range? [Solved]

Hi, the staff of someone, a custom item in trapped server has a range of 55.

I created a new staff, but I can't seem to find where you edit the range of the weapon?

Someone help, thanks a lot.

edit: nvm, i figured out the math formula by myself after checking couple of codes. :P

(Lifetime * Projectile Speed) / 100 = Rannge if i remember