Frag Grenade

The Frag Grenade is a small handheld anti-personnel weapon featured in Call of Duty: Online.

Call of Duty: Online
"Anti-personnel grenade, produces lethal radial damage upon detonation"

- In-Game Description

Multiplayer
The Frag Grenade is unlocked at level 4 and doesn't cost any Credits. It has a fuse time of 6 seconds and litters an area with shrapnel upon detonation, inflicting severe damage on infantry and lightly armored targets.

The Frag Grenade serves as a solid attacking option in many situations. The Frag's detonation radius works well at breaking up enemy groups. Before breaching a room, throw a Frag to clear the immediate area. Cook the grenade for a second or two, and then toss it. This gives your enemy little chance to throw it back or run to a safe location. If you tend to use your Frag often, equip Scavenger to resupply off fallen soldiers.

Trivia

 * Grenades can kill players through certain thin walls due to blast pressure.