Nebula V Ammo is a Field Upgrade featured in Call of Duty: Warzone. It was added as part of the Season Two update of Call of Duty: Vanguard. It could be acquired as ground loot, by opening up Supply Boxes or from destroying the Armored Transport Truck.
When the player activates the field upgrade, it will function similarly to Stopping Power Rounds, except bullets cause a mist of Nebula V gas that damage an enemy. If the player downs an enemy, that enemy will emit a cloud of Nebula V gas and if another player tries to revive them, they will be damaged. The Nebula V gas also affects Gas Mask duration.