For the weapon of the same type, see Ballistic Knife.
Spring Knife Create-a-Class BOII
Spring Knife
Weapon Class Special
Magazine Size 1 blade
Unlocked 5 challenges in Fallen Angel
Starting Ammunition 1+1 (SP)
Maximum Ammunition 1+1 (SP)
Used by J-SOC
HUD icon Spring Knife Pick-Up Icon BOII
"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".