The concussion grenade differs from the Frag Grenade in its method of killing. Instead of relying on explosive force, shrapnel or both it is instead packed with a measured amount of explosive. When detonated the explosion creates a overpressure which can harm or kill the intended target. They are most effective in enclosed spaces with only one exit. The range is shorter then the fragmentation grenade as its power drops sharply with range, but it makes up for it with a more effective killing method then chance of death due to shrapnel.
The grenade is spherical with a vertical slit running along the equator. The user twists and pushes it into place. A button will pop up out of the top which should then be depressed to activate the circuit the user then has five seconds to throw.