Return of Zombie Ops is a zombie modification for Call of Duty 4, it features content from Black Ops Zombie mode aswell as from Modern Warfare 3 Survival mode and Ghosts Extinction mode. It's set slightly in the future with some weapons from Ghosts, Black Ops series and Modern Warfare series.
Full Auto Bullpup Assault rifle. 5.56mm Ball Ammo by default, 30 rounds per clip. 380mm barrel, attached laser Sight. Reflex Sight or Suppressor ready.