Bullets slow enemy movement and briefly disable tactical sprint when shooting legs. Frangible - Disabling will shut down fast enemies trying to make an escape. It works better with fast-firing, lower damage per shot weapons as there's better chance of hitting opponent's legs.

How effective is frangible disabling?

Frangible-Disabling- This attachment will stop an opponent from running if shot in the legs. While this may sound appealing at first, most weapons in this game provide less damage if a player shoots at an opponent's legs. This perk is essentially encouraging players to get the least amount of damage possible.

What is frangible disabling?

Frangible - Disabling is a Weapon Perk that appears in Call of Duty: Modern Warfare. It allows bullets to slow down movement of enemies alongside disabling sprint if shots hit the legs. Affected targets see a similar screen flash to that of Flashbangs when impacted by weaponry equipped with this perk.