|There is more information available on this subject at Concussion Grenade on the English Wikipedia.|
Concussion Grenades are anti-personnel devices that are designed to damage their targets with explosive power all alone. Compared to Fragmentation grenades, the explosive filler is usually of a greater weight and volume. The case is far thinner and is designed to fragment as little as possible. The shock wave overpressure produced by this grenade when used in enclosed areas is greater than that produced by the Frag Grenade. Therefore, it is especially effective in enclosed areas, such as buildings or hallways.