Lifelink is an EpicGun Perk in Call of Duty: Infinite Warfare. It regenerates the entire magazine of a weapon if the player takes any damage from an enemy player. It only appears on the Epic variant of the DCM-8 shotgun, the DCM-8 Masochist. This weapon also has a double magazine capacity to 24 rounds.
Lifelink once allowed the player to have an infinite magazine size at the expense that every shot would damage the player, however this was changed to regenerating magazine size if damaged in the February 3rd, 2017 patch. In Zombies mode however, it still has an unlimited magazine capacity.