Call of Duty: Modern Warfare 3 (MW3) Zombies is an exciting and intense game mode that pits you against hordes of the undead. With a variety of weapons and field upgrades available, it can be difficult to know which ones are best for your playstyle. This guide will provide you with an overview of all the field upgrades in MW3 Zombies and recommended strategies for using them to your advantage.

The first field upgrade available in MW3 Zombies is the Juggernaut Suit. This suit grants you increased health and damage resistance, allowing you to take on more zombies at once. It also increases your movement speed, allowing you to quickly move around the map. The Juggernaut Suit is best used when you are surrounded by a large group of zombies, as it will give you the extra protection you need to survive the onslaught.

The next field upgrade is the Sentry Gun. This gun will automatically fire at any zombie that comes within its range, making it a great tool for defending a specific area. The Sentry Gun is best used when defending a chokepoint or a narrow hallway, as it will be able to target multiple zombies at once.

The third field upgrade is the Claymore Mine. This mine will explode when a zombie comes within its range, dealing massive damage to any nearby undead. The Claymore Mine is best used when defending an area from a large group of zombies, as it can take out multiple enemies in one blast.

The fourth field upgrade is the Tactical Insertion. This upgrade allows you to spawn at any point on the map, allowing you to quickly reposition yourself if you find yourself in a dangerous situation. The Tactical Insertion is best used when you need to quickly escape from a horde of zombies or when you need to get to a specific area quickly.

The fifth field upgrade is the Ballistic Vests. These vests grant you additional protection against bullets and explosives, allowing you to take more damage before going down. The Ballistic Vests are best used when fighting against powerful enemies such as Hellhounds or Juggernauts, as they will give you the extra protection you need to survive their attacks.

Finally, the sixth field upgrade is the Ammo Crate. This crate will drop ammo for all of your weapons, allowing you to restock your supplies in the middle of a firefight. The Ammo Crate is best used when you are running low on ammo and need to quickly replenish your supplies.

Using these field upgrades in combination with each other can give you an edge in MW3 Zombies. By utilizing the right combination of upgrades, you can create powerful defensive positions or quickly reposition yourself in order to survive an onslaught of zombies. With the right strategy and use of these upgrades, you can become an unstoppable force in MW3 Zombies.