Knife/Battlefield 3

Knives are all kit weapons featured in Battlefield 3, providing two ways to utilize them, the standard knife slash or the Knife Takedown method. The weapon can also be used in all three modes in the game (singleplayer, co-op, and multiplayer).

Knife attacks (whether quick or standard) can destroy chain link fences and window glass with a single blow, allowing passage through them (although there are some exceptions such as the Russian spawn building windows in Operation Métro).

When attacking with a knife, the player does not appear on the radar; however, knife sound effects may reveal their position.

Takedowns
A takedown is triggered by holding the button while behind or beside a standing or crouching enemy. A takedown can be initiated from all sides if the enemy is prone.

After initiating a takedown against a standing or crouching enemy, if the enemy turns to face the player at the last second, a unique frontal takedown animation will be shown.