what does ARC WELDER do Red Faction Armageddon

Answer 1

here is what armory says:

Type of Item:  Electrical/Firearm
Origin:  Red Faction Militia
Description:  Capable of stun or kill, Heavy, Electrically charged, Practical, Tough
Uses:  Quiet kills, Stun, Short-Medium Range Attack
This updated version of the original Arc Welder became a standard weapon for the Red Faction Militia of the late 22nd Century. When properly utilized, the Welder could be set to “stun” or “kill” settings. Many militiamen treasured the weapon for this capacity as more than a handful of simple sweeps turned ugly during the rise of the Cultists.