The GKZ-45 Mk3 is a dual-wielded Wonder Weapon that appears in the Zombies map Gorod Krovi of Call of Duty: Black Ops III.

Overview of GKZ-45 Mk3

GKZ-45 , which shoots yellow clouds of energy that slow down zombies. Running through the yellow cloud will cause the player to run quickly and running through the purple cloud will cause the player to go even quicker much like the Overdrive specialist ability or the spores shot by the KT-4 on Zetsubou No Shima. Similar to igniting gas with a spark, shooting the yellow energy with the Ray Gun Mark III will cause it to become a black hole similar to the ones created by the Gersh Device and the Apothicon Servant, but with much lower damage (one-shot kill until round 25-30), smaller range, and shorter duration. Rather than being sucked into the black hole, zombies affected will float up and dissolve into a purple mist, similar to the effect of the Wave Gun, Storm Bow and Skull of Nan Sapwe.