{
  "id": "buyan-m",
  "name": "Buyan M Class (Project 21631 Class)",
  "aliases": [
    "Grad Sviyazhs Class"
  ],
  "domain": "naval",
  "country": "RUS",
  "category": "Corvette",
  "status": null,
  "fielded": 2014,
  "operators": [
    "RUS"
  ],
  "prolif_count": 1,
  "summary": "Buyan M Class (Project 21631 Class) Russian Corvette are armed with Kalibr missiles will be able to lay minefields and block navigation, the Izvestia daily writes. The corvettes were upgraded to engage robotic mines, Defense Ministry sources said.",
  "specs": [
    {
      "k": "crew",
      "v": 52,
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "length_m",
      "v": 75,
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "beam_m",
      "v": 11,
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Draft",
      "section": "dims",
      "v": "2.5 m",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Propulsion",
      "section": "mobility",
      "v": "2 shaft CODAD, 4 x Zvezda M520, 14,584 shp (10,880 kW) and Kolomna Diesel, Pumpjet.",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "speed_kt",
      "v": 26,
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "range_km",
      "v": 4260,
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium",
      "note": "2,300 nmi (4,300 km; 2,600 mi) at 12 knots"
    },
    {
      "k": "",
      "label": "Endurance",
      "section": "mobility",
      "v": "10 days",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Navigation Radar",
      "section": "firecontrol",
      "v": "1 x MP-231-2 navigation radar",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Phased Array Radar",
      "section": "firecontrol",
      "v": "1 x 5P-26M1 Pozitiv-M1 phased array radar system",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Fire Control System",
      "section": "firecontrol",
      "v": "1 x 5P-10-03 Laska fire control system and 1 x МР-123-02 fire control system.",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Sonar System",
      "section": "firecontrol",
      "v": "1 x Anapa-M anti-saboteur sonar system",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Electronic Warfare",
      "section": "protection",
      "v": "1 x TK-25E radar jammer",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "NBC Washdown System",
      "section": "protection",
      "v": "Yes",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Ammunition Weapon Station: caliber",
      "section": "armament",
      "v": "100 mm",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Ammunition Weapon Station: shell weight",
      "section": "armament",
      "v": "26.8 kg; 0.39 kg",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Ammunition Weapon Station: shell",
      "section": "armament",
      "v": "HEI-Frag, Frag-T",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Ammunition Weapon Station: basic load",
      "section": "armament",
      "v": "3,000",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "armament",
      "v": "1 x AK-100 100mm Naval Cannon; 2 x AK-630-M2 CIWS; 1 x Pantsir-M System; 2 x P-800 Oniks Supersonic Anti-Ship Cruise Missile; 1 x DP-65",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium"
    },
    {
      "k": "hulls",
      "v": 11,
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium",
      "note": "Hulls listed in the source card"
    }
  ],
  "payloads": [
    {
      "name": "1 x AK-100 100mm Naval Cannon",
      "role": "Naval Cannon",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium",
      "caps": {
        "Type": "Naval Cannon",
        "Caliber": "100 mm",
        "Rate of fire": "50 to 60 rounds per minute"
      }
    },
    {
      "name": "2 x AK-630-M2 CIWS",
      "role": "Fully automatic naval close-in weapon system based on a six-barreled 3",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium",
      "caps": {
        "Type": "Fully automatic naval close-in weapon system based on a six-barreled 30 mm rotary cannon.",
        "Caliber": "30 mm",
        "Rate of fire": "10,000 rounds/min"
      },
      "range_km": 5
    },
    {
      "name": "1 x Pantsir-M System",
      "role": "Ship-based CIWS/Missile launcher",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium",
      "caps": {
        "Type": "Ship-based CIWS/Missile launcher",
        "Rate of fire": "10000 rounds/minute"
      },
      "range_km": 20
    },
    {
      "name": "2 x P-800 Oniks Supersonic Anti-Ship Cruise Missile",
      "role": "Supersonic Anti-Ship Cruise Missile",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium",
      "caps": {
        "Type": "Supersonic Anti-Ship Cruise Missile",
        "Guidance": "midcourse inertial guidance, active radar homing-passive radar seeker head.",
        "Warhead": "national ver. 300 kg semi-armour piercing HE, thermonuclear; for export 200 kg semi-armour piercing HE.",
        "Speed": "Mach 2",
        "Length": "8.9 m"
      },
      "range_km": 600
    },
    {
      "name": "1 x DP-65",
      "role": "55 mm ten-barreled remotely-controlled naval grenade launcher system",
      "src": [
        "weg-buyan-m"
      ],
      "conf": "medium",
      "caps": {
        "Type": "55 mm ten-barreled remotely-controlled naval grenade launcher system"
      }
    }
  ],
  "variants": [
    {
      "name": "Uglich",
      "text": "Commissioned: 2014 Status: Active Fleet: Caspian Fleet",
      "src": [
        "weg-buyan-m"
      ]
    },
    {
      "name": "Velikiy Ustyug",
      "text": "Commissioned: 2014 Status: Active Fleet: Caspian Fleet",
      "src": [
        "weg-buyan-m"
      ]
    },
    {
      "name": "Zelenyy Dol",
      "text": "Commissioned: 2015 Status: Active Fleet: Baltic Fleet",
      "src": [
        "weg-buyan-m"
      ]
    },
    {
      "name": "Serpukhov",
      "text": "Commissioned: 2015 Status: Active Fleet: Baltic Sea Fleet",
      "src": [
        "weg-buyan-m"
      ]
    },
    {
      "name": "Vyshniy Volochyok",
      "text": "Commissioned: 2018 Status: Active Fleet: Black Sea Fleet",
      "src": [
        "weg-buyan-m"
      ]
    },
    {
      "name": "Orekhovo-Zuyevo",
      "text": "Commissioned: 2018 Status: Active Fleet: Black Sea Fleet",
      "src": [
        "weg-buyan-m"
      ]
    },
    {
      "name": "Ingushetiya",
      "text": "Commissioned: 2019 Status: Active Fleet: Black Sea Fleet",
      "src": [
        "weg-buyan-m"
      ]
    },
    {
      "name": "Grayvoron",
      "text": "Commissioned: 2020 Status: Active Fleet: Black Sea Fleet",
      "src": [
        "weg-buyan-m"
      ]
    }
  ],
  "art": "destroyer",
  "image": null,
  "verified": null,
  "changelog": [
    {
      "date": "2026-10-10",
      "change": "Entry created from the Worldwide Equipment Guide (ODIN), bulk import"
    }
  ],
  "url": "https://www.defensepedia.com/systems/buyan-m.html",
  "sources": {
    "weg-buyan-m": {
      "title": "Buyan M Class (Project 21631 Class) Russian Corvette",
      "publisher": "U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)",
      "url": "https://odin.t2com.army.mil/WEG/Asset/Buyan_M_Class_Project_21631_Class_Russian_Corvette",
      "published": "2026-03-20",
      "tier": 1,
      "checked": "2026-10-10"
    }
  }
}