The 40mm GP-34 underbarrel anti-personnel grenade launcher is designed to engage enemy manpower located in the open, in trenches and on reverse slopes of the terrain.

The grenade launcher is used while attached to Kalashnikov and Nikonov assault rifles.

The grenade launcher is loaded from the muzzle.

The grenade launcher can deliver both flat and high angle fire.

The grenade launcher fires the following ammunition:

• VOG-25M round with 40mm fragmentation grenade;
• VOG-25P round with 40mm fragmentation grenade;
• VOG-25PM round from 40mm “jumping” fragmentation grenade.