I have this i idea to make a medieval type map
intead of having the guns it would have like swordl, halbierd,spear stuff like that. there may be a box but it would be waek and hard to use. but in order to do this id have to put the guns range real low and stuff, and im not sure if thats possible. im new to the whole modding stuff. *did search nothing came up, so dont crucify me*

cant change the weapons attributes, so no. if you want a gun to become melee, get really close and shoot

Heres how you do it:

First, make those weapons.
Second, make an arena kinda map, fill it with Colliders so only riflebutting works.
Third, give your mod, and your map, to your friends, and play.

In soldat ultra manager, you can change the weapons, but I don't know if you can actually change its attributes, instead of just ammo amount, damage, that kind of thing.

all i would change is the range, then work weopons around the damage

You can't change the range...
You can change the damage with the dedicated server...

http://www.turrino.it/page.php?id=54 that's all you can get as far as medieval theme :P