Body Armor, also known simply as Armor in Zombies and Blackout, is a system introduced in Call of Duty: Black Ops 4, and is featured in Multiplayer, Blackout, and Zombies.
Body Armor appears in Multiplayer as an equippable gear that reduces damage from bullets at the cost of a slower movement speed. Once the armor is destroyed, the player will regain their normal movement speed however the armor will be gone until the player respawns.
Armor can be found scattered around throughout the map of Blackout. Each piece of armor varies in level, ranging from Level 1 to 3, with each 3 being the strongest. It takes damage, however, and can break if enough damage is taken. However, armor can be either replaced by finding new armor, or repairing it using Armor Plating.
Armor is also featured in Zombies, and can be obtained by the player by activating their specialist weapon, which will grant the player 2 extra hits, and using Stone Cold Stronghold, which will grant the player 1 extra hit. Once the extra hits gained by Armor are taken, the Armor will disappear and can only be reobtained by repeating the same process as done before.