Ray Gun Mark II

The Ray Gun Mark II is a wonder weapon that was released alongside the Zombies map, Buried, and is featured in all Zombies maps in Call of Duty: Black Ops II (only if the player has downloaded the Vengeance map pack), in Call of Duty: Black Ops III in all the remastered maps featured in the Zombies Chronicles map pack, and in Call of Duty: Black Ops 4 in Zombies and Blackout. It is the successor and the evolution of the Ray Gun, although, unlike its predecessor, the Ray Gun Mark II fires in three-round bursts with no significant splash damage. It also has a very high penetration ability, capable of killing many zombies with one burst. Its successor is the GKZ-45 Mk3.

It should be noted that the Ray Gun Mark II has remarkable headshot damage, which is nearly a 21.7x damage multiplier when a shot hits the head. In the later rounds, it is very worthwhile to headshot Zombies, as this multiplier also applies to the Porter's Mark II Ray Gun, making it deal a whopping 100,000 damage per headshot. This is enough to kill with one headshot until round 58, and one burst will kill until round 70. Though its damage will become futile in the early to mid 80's as they will take 4+ bursts in head.