F1 grenade fitted with a launching tube which was fired with the use of an attachment to the rifle.
It was fitted with an impact fuze which was held in the top part of the stick.
The safety was released upon launching, by a pyrotechnical element, causing the safetypin to break.
The whole was painted green and had black markings.
This grenade only served a short time and was replaced by the KGN.

Photo below © Przemek.