Juggernaut Suit

A Juggernaut Suit is a piece of equipment seen in Call of Duty: Modern Warfare 2 and Call of Duty: Black Ops, and is usable in Call of Duty: Modern Warfare 3 and Call of Duty: Ghosts.

Call of Duty: Modern Warfare 2
Juggernauts are seen wearing the suits in the Special Ops levels "Snatch & Grab", "Estate Takedown", "High Explosive", and "Armor Piercing". A character with a juggernaut suit is also seen in "Museum".

Originally, a killstreak known as "Heavy Armor" was cut from Modern Warfare 2 ' s multiplayer, where the player was able to go into a juggernaut suit.

Call of Duty: Black Ops
In Call of Duty: Black Ops, enemies use juggernaut suits in the levels "Vorkuta" and "Redemption". However, they aren't usable to the player at all.

Multiplayer
In multiplayer, there are two pointstreaks that allow the player to utilize Juggernaut suits. They are the Assault Juggernaut, which uses an M60E4, and the Support Juggernaut which uses a Riot Shield.

In addition, in the game mode Money In The Denk, the player who has the bomb is equipped with a Juggernaut suit and Desert Eagle. Also, in Infected, there is a variant referred to as "Striker vs. Jugg", where the surviving players would have Akimbo .44 Magnums. There was also a removed version known as "Jugg vs. MK46", where the infected would have only a Juggernaut suit and a Knife.

In private matches, the player has the option to enable Juggernaut suits for premade classes in game modes, including enabling it to survivors and infected players in Infected.

Special Ops
In Special Ops Survival Mode, Mission Mode, and Special Ops Chaos, enemies are seen using Juggernaut suits, varying from a lighter armor to very heavy version.

In the missions "Toxic Paradise" and "Invisible Threat", the player is given a Juggernaut suit in their arsenal. Various other levels have enemies in Juggernaut suits fighting against the player.

Call of Duty: Ghosts
Juggernaut suits appear in multiplayer in three forms - the Assault Juggernaut, Support Juggernaut, and the new Maniac.

The Assault Juggernaut uses a Minigun, the Juggernaut Recon uses a Riot Shield, and the Maniac a Combat Knife.