Grenade

USES
The grenade is just a regular fragmentation item. However it can create a large explosion. It's pretty hard to use though, so your aim and timing has to be precise. It is most used for blind fragging, for example; You are behind a door and an enemy is outside the door. You toss a grenade out of the doorframe, not sure if you will hit the hostile. But finally, the explosion is set off and you land a perfect hit on the enemy.

DAMAGE
If you land a direct hit on a hostile with the grenade, it will instantly kill the enemy. But if the hostile is just at the limit of the radius of the explosion, it won't one hit the hostile, but it will make him bleed out.

RARITY
In general, the grenade isn't that rare. It is found in police stations, and pretty much every single area with military locations, such as Airfield, and small military camps.