Dead Wire is a Pack-a-Punch upgrade in Call of Duty: Black Ops III. It allows the weapon to occasionally fire an electrically charged bullet that will shock zombies in a small area.
The Dead Wire effect will affect up to nine zombies including the one on which the effect was triggered, giving a maximum of nine kills per activation, just one kill below the Wunderwaffe DG-2. It is also very effective, capable of killing zombies forever due to its infinite damage. However, similar to the Wunderwaffe, zombies killed by the lightning cannot drop power-ups and the kills do not charge the player's special weapon.
In addition, this effect appears to activate more frequently than the other Pack-a-Punch upgrades, and will consistently trigger on the first bullet fired after the previous Dead Wire effect has ended.
Because of Dead Wire's positive features, Dead Wire is a very effective Pack-a-Punch upgrade.