The "war" configs switch out wands and spells for guns and bullets. Magic block effects are leveraged for massive environment destructibility.
Simply add the following to your plugins/Magic/config.yml on a new line to enable these configs:
example: war
You will want some way for players to get weapons. Essentials kits can work, or you could use NPC shops or some other mechanic. These configs are pretty new so a lot is left up to you :)
See here for available weapons: http://mine.elmakers.com/?example=war#wands
Click on each one for instructions, generally you use "/mgive " to give items to players.
They can be put in Essentials kits using a format like "wand:ak47".