Artillery

K-300P Bastion-P

Also known as
  • Bastion
  • Bastion-P
  • 3K55 Bastion
  • SS-C-5 Stooge
  • P-800 Oniks ground-launched system

The K-300P Bastion-P is the mobile member of Russia's Bastion coastal-defense launch-system family. It launches P-800 Oniks/Yakhont supersonic anti-ship cruise missiles from road-mobile launchers, giving coastal forces a transportable sea-denial system that Russian forces have also used for land-attack strikes against Ukraine.

K-300P Bastion-P, Mobile coastal-defense missile system, Artillery
Image source: Wikimedia Commons - K-300P Bastion-P.jpg

Role in Conflicts

Profile / Specs

Profile

Origin
Russia
Type
Mobile coastal-defense missile system
Service note
Entered Russian Bastion ground-launched service in the mid-2010s and remained operational during the full-scale Russia-Ukraine War.
Designer
NPO Mashinostroyenia
Designed
1990s Oniks/Yakhont development; Bastion ground-launched systems deployed by Russia from 2015
Produced
Late 2000s-present

Specifications

Role
Mobile coastal-defense missile system for engaging large surface ships; Rosoboronexport also describes engagement of radio-contrast ground targets
Primary missile
P-800 Oniks / Yakhont supersonic anti-ship cruise missile
Launch-system variants
Transportable Bastion-P and stationary Bastion-S
Launcher load
Bastion-P TEL carries two Yakhont missiles
Missile range
300 km maximum fire range in Rosoboronexport export-system data; CSIS lists 300 km default trajectory and 120 km low-altitude trajectory for Oniks/Yakhont
Missile velocity
680-750 m/s in Rosoboronexport export-system data
Propulsion
Rocket booster with kerosene-powered ramjet sustainment
Launch weight
About 3,000 kg for the surface-to-surface missile
Warhead
High-explosive or semi-armour-piercing warhead options reported at about 200-250 kg
Variants

Bastion is best treated as a launch-system family: this record covers the mobile K-300P/Bastion-P configuration, while sources also identify a stationary Bastion-S configuration.

VariantConfigurationDesignation notes
Bastion-SStationary coastal-defense launcher

CSIS identifies Bastion-S as the stationary Bastion launch-system variant for ground-launched Oniks/Yakhont missiles.

Sources: CSIS Missile Threat - P-800 Oniks/Yakhont/Bastion

Missile Armament

Bastion-P is the coastal-defense launch system; Oniks/Yakhont is the missile it fires.

Launched itemItem typeLaunch evidence
P-800 Oniks, Supersonic anti-ship cruise missile, MunitionsP-800 OniksSupersonic anti-ship cruise missile

CSIS identifies Bastion-P as the transportable ground-launch system for Oniks/Yakhont, and Missile Defense Advocacy Alliance describes the Bastion-P TEL carrying two Yakhont missiles.

Sources: CSIS Missile Threat - P-800 Oniks/Yakhont/Bastion, Missile Defense Advocacy Alliance - P-800 Oniks

Timeline

K-300P Bastion-P Key Events

  1. Oniks missile enters Russian service

    CSIS lists 2002 as the service-entry year for the Oniks missile family later used by Bastion launch systems.

    Sources: CSIS Missile Threat - P-800 Oniks/Yakhont/Bastion

  2. Bastion ground-launched systems enter service

    CSIS lists 2015 as the in-service date for Bastion ground-launch systems.

    Sources: CSIS Missile Threat - P-800 Oniks/Yakhont/Bastion

  3. Oniks missile from Bastion shot down near Odesa

    Ukrinform relayed Ukrainian regional and Operational Command South reporting that an Oniks missile launched from occupied Crimea by a Bastion coastal missile complex was shot down on its route toward the Izmail district.

    Sources: Ukrinform - Onyx missile from Bastion toward Izmail district

  4. Bastion-launched Oniks missiles target Odesa region

    Ukrinform, citing the Ukrainian Air Force, reported six Oniks cruise missiles launched from the Bastion coastal missile system in Crimea during a multi-wave attack focused on the Odesa region.

    Sources: Ukrinform - Air Force says Oniks missiles launched from Bastion in Crimea

  5. Odesa port and grain infrastructure attacked

    Ukrinform reported Operational Command South spokesperson Nataliia Humeniuk's statement that two Oniks missiles were fired from Bastion systems in occupied Crimea during an attack on Odesa coastal, port, and grain infrastructure.

    Sources: Ukrinform - Humeniuk on Oniks from Bastion in occupied Crimea

Media

K-300P Bastion-P Videos

Related Weapon Systems
Mobile coastal launcher, Truck-mounted mobile coastal launcher for anti-ship cruise missiles, Naval SystemsNaval SystemsMobile coastal launcherTruck-mounted mobile coastal launcher for anti-ship cruise missilesThe Houthi mobile coastal launcher is a road-mobile shore-launch arrangement for anti-ship cruise missiles, built around recovered Yemeni C.801 launch equipment, trucks, and surface-search radars. It links the Al-Mandab-1/C-801 family to 2014 Yemen Civil War coastal defense and later appears in 2023 Red Sea Crisis reporting as Houthi truck-mounted anti-ship missiles and launchers threatened shipping from Houthi-controlled Yemen.

Sources

CSIS Missile Threat - P-800 Oniks/Yakhont/BastionPublisher: Center for Strategic and International Studies | Note: Supports Bastion-P/Bastion-S launch-system relationship to Oniks/Yakhont, NPO Mashinostroyenia background, service timing, range, propulsion, launch weight, warhead, and missile-family variant context. | Accessed: 2026-07-13Rosoboronexport - Bastion coastal defence systemPublisher: Rosoboronexport | Note: Supports Bastion as a coastal defence system using Yakhont missiles, target set, mobility, maximum range, missile velocity, and export-system characteristics. | Accessed: 2026-07-13Missile Defense Advocacy Alliance - P-800 OniksPublisher: Missile Defense Advocacy Alliance | Note: Supports Bastion-P road-mobile launcher context, two Yakhont missiles per TEL, launch interval context, and Bastion-P/Bastion-S ground-launch relationship. | Accessed: 2026-07-13Ukrinform - Air Force says Oniks missiles launched from Bastion in CrimeaPublisher: Ukrinform | Note: Direct 2014 Russia-Ukraine War conflict-use source: cites the Ukrainian Air Force report that six Oniks cruise missiles were launched from the Bastion coastal missile system in Crimea during the July 19, 2023 attack on the Odesa region. | Accessed: 2026-07-13Ukrinform - Onyx missile from Bastion toward Izmail districtPublisher: Ukrinform | Note: Direct 2014 Russia-Ukraine War conflict-use source: relays Odesa regional and Operational Command South reporting that an Oniks missile launched from occupied Crimea by a Bastion coastal missile complex was shot down en route toward the Izmail district. | Accessed: 2026-07-13Ukrinform - Humeniuk on Oniks from Bastion in occupied CrimeaPublisher: Ukrinform | Note: Direct 2014 Russia-Ukraine War conflict-use source: reports Operational Command South spokesperson Nataliia Humeniuk's statement that two Oniks missiles were fired from the Bastion missile system in occupied Crimea during the September 25, 2023 Odesa attack. | Accessed: 2026-07-13Defense Express - Oniks missiles from Bastion toward OdesaPublisher: Defense Express | Note: Direct 2014 Russia-Ukraine War conflict-use source: reports Operational Command South information that Russian forces fired P-800 Oniks missiles from the Bastion coastal-defense system in occupied Crimea toward the Odesa region in December 2022. | Accessed: 2026-07-13The War Zone - Bastion-P anti-ship missiles against ground targets in UkrainePublisher: The War Zone | Note: Supports early Ukraine conflict-use context by reporting Russian Ministry of Defense claims and visual evidence of Bastion-P launches from occupied Crimea against ground targets in Ukraine, with caveats about relying on Russian accounts. | Accessed: 2026-07-13Wikimedia Commons - K-300P Bastion-P.jpgPublisher: Wikimedia Commons | Note: Image provenance for the K-300P Bastion-P photograph, attributed on Commons to the Ministry of Defence of the Russian Federation. | Accessed: 2026-07-13