A single shot, front loaded, rifled underbarrel grenade launcher for assault rifles made in Warsaw Pact countries. The firing mechanism is self-cocking, with a manual safety catch and automatic shot prevention if incorrectly installed onto a rifle. Uses VOG-25 grenades.

Call of Pripyat item description

The Granatomyot Podstvolnyi 25 "Kostyor" (Grenade launcher, Underbarrel 25 - "Bonfire"), named the GP-25 Koster in-game, is a Soviet-made muzzle-loading underbarrel grenade launcher appearing in all three S.T.A.L.K.E.R. games.

GP-25 being loaded w/standard VOG-25 (as a curious fleshpig watches)

GP-25's quadrant sight (which many find to be easier to use than a ladder or leaf sight)

Overview[edit | edit source]

An AKM-74/2 with a GP 25 attached

A Tunder S14 with an integral GP 25

Originally made for AK type rifles, it uses 40mm VOG-25 Grenade shells. The GP-25 ,like the M203, is a destructive weapon. It can be used to bombard enemies from a distance, flush out targets hiding behind cover, and deal heavy damage to powerful mutants like the Pseudogiant. Although powerful, it is also rare if not expensive and destructive to both the enemy and the player if not used correctly. This weapon can only be mounted on Eastern Bloc weaponry.

Compatibility[edit | edit source]

The GP-25 Koster can be mounted on Eastern Bloc weapons. In Clear Sky and Call of Pripyat, upgrades might be necessary in order to mount the grenade launcher. The Tunder S14, however, sports the launcher by default and cannot be removed.

Shadow of Chernobyl[edit | edit source]

Clear Sky[edit | edit source]

Call of Pripyat[edit | edit source]

Appearances[edit | edit source]

Shadow of Chernobyl[edit | edit source]

In Shadow of Chernobyl it was rare and found attached to an AKM-74/2, in X-18 in one of the lockers. In this game it is referred to as a GP-25 Kostyer , unlike in the two later games.

Clear Sky[edit | edit source]

In Clear Sky it became much more available as it can be bought from a number of traders, certain stashes and from Duty Exoskeleton units sporting heavily upgraded AC-96/2 assault rifles with a PSO-1 Scope and a grenade launcher. The first chance you have of acquiring a GP-25 is from Ashot after assisting Freedom drive the mercenaries out of the Dark Valley where he'll start to sell it. One can be acquired for free from Hermit after completing the job of recovering Abel's PDA.

Call of Pripyat[edit | edit source]

Like in Clear Sky, it is far more available and can be bought from all traders, found in numerous stashes and can be found attached to weapons carried by various high ranking stalkers.

Acquisition[edit | edit source]

Grenade launcher


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