GP-25 Kostyor
Country: 
RussiaManufacturer: TsKIB SOO Tula
«GP-25 / 6G15»
Grenade launcherRussia1978In service
Soviet 40 mm caseless grenade launcher mounted under AK-74/AKM; rifled muzzle-loaded barrel, tangent quadrant sight; nicknamed 'Kostyor' (bonfire).
Grenade launcher//Russia
ID — GP-25-KOSTYOR
Designation
GP-25 Kostyor
TsKIB SOO Tula
Caliber
40 mm caseless (VOG-25)
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Data trust
- Reliability
- Unverified
- Sources
- Sources pending review
Identity
- Designation
- GP-25 Kostyor
- Alias
- GP-25 / 6G15
- Manufacturer
- TsKIB SOO Tula
- Country
- Russia
- Year
- 1978
- Category
- Grenade launcher
- Status
- In service
Ballistics
- Caliber
- 40 mm caseless (VOG-25)
- Muzzle velocity
- 76 m/s
- Effective range
- 100 m
- Maximum range
- 400 m
Dimensions
- Barrel length
- 205 mm
- Overall length
- 323 mm
- Empty weight
- 1.5 kg
Mechanics
- Operating system
- Colpo singolo, avancarica rigata
- Bolt / action
- Single shot, percussore
Feed
- System
- Caricamento dalla volata
- Standard capacity
- 1 rounds
Fire modes
SafeSemi-auto
Historical profile
Adopted in 1978 as the Soviet response to the American M203, it uses caseless VOG-25 grenades with propellant integrated in the projectile body.
The muzzle-loaded rifled barrel spins the grenade, removing the need for breech loading and speeding up the rate (~5 rpm).
Widely used in Afghanistan, Chechnya, Syria and Ukraine; GP-30 (1989, lighter) and GP-34 (2007) variants; cloned in Bulgaria (UBGL) and still produced in Russia today.
Variants
GP-25 (1978)GP-30 Obuvka (1989)GP-34 (2007)
Main users
USSR / Russia · Bulgaria · Poland · Vietnam · Syria · Ukraine · Cuba
Key components
- ●Stock — Shoulder rest.
- ●Receiver — Weapon body with internal mechanisms.
- ●Grip — Primary grip.
- ●Magazine — Cartridge feed.
- ●Barrel — Guides the projectile.
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