"Killing an enemy grants increased fire rate and reduced recoil for a short time."
— In-game description
Berserker is an Epicgun perk in Call of Duty: Infinite Warfare. It is the Karma-45 Deimos, the VPR Hades and the Atlas Annihilators Epic Gun perk. Upon killing an enemy, the weapon's fire rate and recoil are increased and decreased respectively for a short period of time.