Grenade

These high-explosive concussion hand grenades (as opposed to a fragmentation grenade), looking much like their "potato masher" predecessors, and are as such easily thrown due to their elongated handles. They have two detonators; primary is a four-second timer, armed upon throwing, which is useful for throwing around corners and in tight quarters, assuming you have an escape route. Secondary is an impact detonator - as soon as it hits something, it explodes. They have a very short range, so be careful about that five-meter radius yourself. Enemies rarely use grenades against you, but there are instances when you'll be hearing blasts and wondering where the heck they're coming from.