5 challenges in Fallen Angel
- "Spring-action knife launcher. Increases melee speed and can fire the blade as a projectile."
- — Create-A-Class description.
The Spring Knife is a Special weapon available in the campaign mode of Call of Duty: Black Ops II. It reuses the model of the Ballistic Knife from Call of Duty: Black Ops. It is unlocked by completing five challenges in the campaign mission "Fallen Angel".