I have an Armageddon V3. What do you mean by arcing, and does it have anything to do with the button clicking?
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I don't think button clicking applies. Arcing looks like little sparks right where the contact strip touches the nut on the 510 when you press the button. It looks like a little microscopic sparkler going off. Go into a pitch black room/closet with the door off of your mod and press the fire button while watching the contact area. If it arcs, you'll see it.