Reactor Core menu icon BO4
"Emits a damaging radiation field that burns enemies, reducing their max health for a time and preventing healing."
— Description

The Reactor Core is a piece of Specialist equipment featured in Call of Duty: Black Ops 4, exclusive to Krystof "Firebreak" Hejek.


The Reactor Core deals fire/radiation damage to enemy players close to you, ignoring cover and walls. The player using Reactor Core will also gain a defensive buff, reducing damage taken. However, using reactor core for too long will begin to damage the user, quickly killing them.

Enemies that are damaged by the effect of the Reactor Core will have their maximum health reduced by the amount of damage taken by the Reactor Core and are unable to heal to their normal total health. The health reducing effect wears off after 15 seconds of not being affected by it, after which the afflicted can regain their normal total health.


  • Radiation goes through cover and walls.
  • Attacked crowded interiors from outside.
  • Inflicts burns, preventing healing.
  • Can move slowly while in use.
  • Second stage has bonus damage, range.
  • Second stage drains your health.
  • Has surprising vertical range.
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