A Cold War-ear fragmentation grenade. Reduce time to detonation by "cooking" it. Just don't hold on to it for too long.
Grenades are useful for taking out groups of enemies, as well as vehicles. You can cook them by pulling the pin, holding them, then throwing it after a few seconds. However, if you hold onto it too long, it will explode in your hands (or in close proximity), causing major damage to yourself.

