Sponge grenade

A sponge grenade is a riot control weapon, intended to be non-lethal, which is fired from a 40 mm grenade launcher to cause confusion, or otherwise temporarily disable its target. As a single blunt force object, it is best used when aimed at a particular individual.

The projectile weighs about 28 grams (0.99 ounces). It is bullet-shaped, with a foam rubber nose and a high-density, plastic projectile body.