The Granat zaczepny wz.24 (Polish for Offensive grenade, Mark 1924) was a concussion grenade used by the Polish Army before and during World War II.

The oval egg-shaped shell casing was made of thin sheet metal filled with picric acid or TNT.

Initially used with a variety of fuses, since early 1930s the grenade was used with the standard Zapalnik wz.

24/31 to distinguish it from the original wz.24 grenade armed with different fuses.

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