# R-37 (missile)
**R-37** (NATO reporting name AA-13 Axehead, also cited as AA-13 Arrow) is a Russian very-long-range air-to-air missile developed by the Vympel design bureau to engage high-value, low-maneuverability targets such as AWACS aircraft, tankers, and bombers while keeping the launching fighter outside the range of enemy escorts[1](https://en.missilery.info/missile/r37) • [2](https://www.weaponspecs.com/systems/ktrv/r-37m/). The modernized R-37M (RS-AA-13A Axehead) is carried principally by the MiG-31BM interceptor and has become the [Russian Aerospace Forces](https://www.edgepedia.org/russian-aerospace-forces)' main long-range air-denial weapon in the war in Ukraine[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf) • [4](https://static.rusi.org/SR-Russian-Air-War-Ukraine-web-final.pdf).
| Key fact | Detail |
|---|---|
| Designer | State Design Bureau "Vympel" (GosMKB Vympel), part of the Tactical Missile Corporation; Vympel is now within the Almaz-Antey corporation[1](https://en.missilery.info/missile/r37) • [5](https://macvympel.ru/en/about/istoriya-kompanii/) |
| Origin | K-37 (Izdeliye 610) development for the MiG-31M interceptor, based on the K-33 (R-33) missile, initiated by a USSR Council of Ministers decision of April 8, 1983[1](https://en.missilery.info/missile/r37) |
| Service entry | K-37 canceled in the mid-1990s for lack of funding; the R-37M was introduced into the inventory in 2016 (IISS), with Janes dating VKS service entry to 2014[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf) • [6](https://www.janes.com/defence-intelligence-insights/defence-news/defence/russia-fielding-nuclear-air-to-air-missiles-us-assesses) |
| Range | Export RVV-BD: published maximum launch range 200 km; Russian claims for the domestic weapon extend to 300–400 km under favorable launch conditions[7](https://www.battlepolicy.com/r-37m/) |
| Speed and warhead | Reported Mach 6; 60 kg warhead; export version maximum altitude 25 km[8](https://migflug.com/aircraft/mig-31-foxhound/) • [9](https://www.vtg.mod.gov.rs/arhiva/2024/vojnotehnicki-glasnik-vol-72-no-3-2024.pdf) |
| Main carriers | MiG-31BM interceptor; also test fired from the Su-35S and increasingly used from Su-35S and Su-30SM2 fleets[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf) • [10](https://www.rusi.org/explore-our-research/publications/insights-papers/evolution-russian-and-chinese-air-power-threats?pubDate=20260209) |
| Combat use | Up to six R-37Ms fired per day by the VKS in October 2022 from MiG-31BM patrols along eight zones of the Ukrainian front[4](https://static.rusi.org/SR-Russian-Air-War-Ukraine-web-final.pdf) |
## Development
The K-37 (Izdeliye 610) was begun in 1983 as the armament for the advanced MiG-31M interceptor, derived from the earlier K-33 (R-33) missile that armed the original MiG-31[1](https://en.missilery.info/missile/r37). In May 1994 Russian reports indicated an Air Force test in which an R-37 fired from a MiG-31 intercepted a target, and Russian television showed a MiG-31M at the Akhtubinsk test center with four R-37s partially recessed into the fuselage; the folding rear fins suggested the missile was meant to be carried internally[11](https://www.nonproliferation.org/wp-content/uploads/npr/21miss.pdf). A MiG-31M with the K-37 was presented at the MAKS-1997 air show, but the [Russian Air Force](https://www.edgepedia.org/russian-air-force) did not accept the missile for service[1](https://en.missilery.info/missile/r37).
**Cancellation and revival.** Despite successful tests, the K-37 project was canceled in the mid-1990s due to a lack of funding, which also saw the cancellation of the MiG-31M Foxhound B[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf). A further development of the K-37, the R-37M, was eventually introduced into the inventory in 2016 according to the IISS; Janes dates its entry into VKS service with a conventional warhead to 2014[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf) • [6](https://www.janes.com/defence-intelligence-insights/defence-news/defence/russia-fielding-nuclear-air-to-air-missiles-us-assesses). The R-37M is a modernized variant of the K-37, designated Izdeliye 610M[6](https://www.janes.com/defence-intelligence-insights/defence-news/defence/russia-fielding-nuclear-air-to-air-missiles-us-assesses).
## Design and performance
The R-37M is a very-long-range, supersonic missile with a dual-pulse solid motor, a 60 kg warhead, and an active radar seeker, so the launching aircraft need not keep illuminating the target; the reported top speed is Mach 6[8](https://migflug.com/aircraft/mig-31-foxhound/). Its guidance combines inertial navigation with mid-course updates and active radar homing in the terminal phase[12](https://aparchitexamwarriors.com/public/uploaded_files/aparchitpdf/67ce41e4099a7-monthly_february_english_aparchit_super_current_affairs_best_350%2B.pdf). The seeker is designed for engaging low-altitude targets, which, together with the weapon's very high speed and long effective range, makes it particularly difficult to evade[4](https://static.rusi.org/SR-Russian-Air-War-Ukraine-web-final.pdf).
**Range claims.** [Rosoboronexport](https://www.edgepedia.org/rosoboronexport) markets an export version as the RVV-BD (Raketa Vozduh-Vozduh Bolshoy Dalnosti, "air-to-air missile of very long range"), presented in 2023, with a published maximum launch range of 200 km, a maximum altitude of 25 km, and a 60 kg warhead[7](https://www.battlepolicy.com/r-37m/) • [9](https://www.vtg.mod.gov.rs/arhiva/2024/vojnotehnicki-glasnik-vol-72-no-3-2024.pdf) • [13](https://themilitarydatabase.com/equipment/192). Russian claims for the domestic weapon extend to 300–400 km under favorable launch conditions, but the true operational envelope is not publicly established[7](https://www.battlepolicy.com/r-37m/). Quoted maximum ranges describe an outer kinematic boundary rather than the distance at which a maneuvering target cannot evade, and they depend heavily on the launch platform: a MiG-31BM flying high and supersonic imparts substantially more initial energy than a fighter launching from lower altitude or speed[7](https://www.battlepolicy.com/r-37m/).
## Carriage and platforms
The R-37M entered service with the MiG-31BM Foxhound C, a more modest upgrade than the planned new-build MiG-31M[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf). It has also been test fired from the Su-35S, and during the war in Ukraine the VKS began employing it from at least a few Su-35S fighters, which RUSI interpreted as suggesting Russian stocks were in little danger of running out[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf) • [4](https://static.rusi.org/SR-Russian-Air-War-Ukraine-web-final.pdf). By 2025 the conversion of the Su-35S, and increasingly the Su-30SM2 fleets, to rely primarily on the R-37M instead of the medium-range [R-77](https://www.edgepedia.org/r-77)-1 had significantly increased the threat they can theoretically pose to NATO air operations[10](https://www.rusi.org/explore-our-research/publications/insights-papers/evolution-russian-and-chinese-air-power-threats?pubDate=20260209). The export RVV-BD is advertised as compatible with the Su-57, Su-30, Su-35, MiG-31BM, and MiG-35[9](https://www.vtg.mod.gov.rs/arhiva/2024/vojnotehnicki-glasnik-vol-72-no-3-2024.pdf).
A follow-on project, possibly known as Izdeliye 810 (RS-AA-X-14), begun around 2010, is designed for internal carriage in the Su-57's weapons bay and is intended to form part of the improved armament for the Su-35S and MiG-31BM[3](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf) • [14](https://www.foi.se/rest-api/report/FOI-R--4991--SE).
## Combat use in Ukraine
From autumn 2022, Russian MiG-31BM patrols launched long-range shots from Russian-controlled airspace, threatening Ukrainian aircraft before they could reach their preferred engagement positions[15](https://defencesecurityasia.com/en/russia-r37m-500-missile-plan-ukraine-azov-strike/). The VKS divided the front line into eight zones, each patrolled by a pair of Su-35S fighters or MiG-31BM interceptors, and fired up to six R-37Ms per day during October 2022[4](https://static.rusi.org/SR-Russian-Air-War-Ukraine-web-final.pdf). The missile's reach, combined with the MiG-31BM's high operating altitude, allowed Russian interceptors to menace Ukrainian aircraft near the frontlines from outside the range of Ukrainian defenses[4](https://static.rusi.org/SR-Russian-Air-War-Ukraine-web-final.pdf).
**Effect as air denial.** The R-37M's primary significance in the war has been as an air-denial weapon: its reported reach compels Ukrainian aircraft to fly lower, reduce exposure times, and modify attack profiles[7](https://www.battlepolicy.com/r-37m/). Specific Russian claims of long-range kills remain unconfirmed independently[7](https://www.battlepolicy.com/r-37m/). In an evaluation covering four years of fighting, RUSI determined that Russian Su-35s, Su-30s, and MiG-31s—which repeatedly launched R-37M missiles at Ukrainian aircraft that were frequently outdated and possessed minimal defensive sensors—had scored only a small number of air-to-air victories during the war.[10](https://www.rusi.org/explore-our-research/publications/insights-papers/evolution-russian-and-chinese-air-power-threats?pubDate=20260209)
## Production and export
A leaked Russian defense-industry letter indicates that the Russian Aerospace Forces sought component deliveries sufficient to support 500 R-37M missiles annually from 2026; the feasibility of that target remains unverified after Ukraine struck a key supplier[15](https://defencesecurityasia.com/en/russia-r37m-500-missile-plan-ukraine-azov-strike/). Russia has reportedly offered the R-37M to India, with discussion of joint development or domestic manufacture[12](https://aparchitexamwarriors.com/public/uploaded_files/aparchitpdf/67ce41e4099a7-monthly_february_english_aparchit_super_current_affairs_best_350%2B.pdf) • [13](https://themilitarydatabase.com/equipment/192). A US Defense Intelligence Agency assessment reported in 2025 that Russia had begun deploying a nuclear-capable variant based on the R-37M, with characteristics classified[16](https://as.com/actualidad/sociedad/rusia-pone-en-alerta-a-estados-unidos-con-el-misil-aire-aire-mas-peligroso-vuela-a-mach-6-y-tiene-capacidad-nuclear-n/).
## References
1. [R-37 long-range aircraft missile (RVV-BD), Missilery.info](https://en.missilery.info/missile/r37)
2. [R-37M, specs & comparison, WeaponSpecs](https://www.weaponspecs.com/systems/ktrv/r-37m/)
3. [European Combat Air Power: A Snapshot, IISS (2022)](https://www.iiss.org/globalassets/media-library---content--migration/files/research-papers/2022/03/european-combat-air-power-a-snapshot.pdf)
4. [The Russian Air War and Ukrainian Requirements for Air Defence, RUSI (Bronk, Reynolds, Watling, 2022)](https://static.rusi.org/SR-Russian-Air-War-Ukraine-web-final.pdf)
5. [Company history, Vympel Interstate Corporation](https://macvympel.ru/en/about/istoriya-kompanii/)
6. [Russia fielding nuclear air-to-air missiles, US assesses, Janes](https://www.janes.com/defence-intelligence-insights/defence-news/defence/russia-fielding-nuclear-air-to-air-missiles-us-assesses)
7. [R-37M: Russia's very-long-range air-to-air missile, BattlePolicy](https://www.battlepolicy.com/r-37m/)
8. [Mikoyan-Gurevich MiG-31 Foxhound, MiGFlug](https://migflug.com/aircraft/mig-31-foxhound/)
9. [Vojnotehnički glasnik / Military Technical Courier, Vol. 72 No. 3 (2024)](https://www.vtg.mod.gov.rs/arhiva/2024/vojnotehnicki-glasnik-vol-72-no-3-2024.pdf)
10. [The Evolution of Russian and Chinese Air Power Threats, RUSI](https://www.rusi.org/explore-our-research/publications/insights-papers/evolution-russian-and-chinese-air-power-threats?pubDate=20260209)
11. [Missile Developments, The Nonproliferation Review, Fall 1994](https://www.nonproliferation.org/wp-content/uploads/npr/21miss.pdf)
12. [APARCHIT current affairs compilation (February 2024)](https://aparchitexamwarriors.com/public/uploaded_files/aparchitpdf/67ce41e4099a7-monthly_february_english_aparchit_super_current_affairs_best_350%2B.pdf)
13. [RVV-BD, The Military Database](https://themilitarydatabase.com/equipment/192)
14. [Beyond Bursting Bubbles: Understanding the Full Spectrum of the Russian A2/AD Threat, FOI](https://www.foi.se/rest-api/report/FOI-R--4991--SE)
15. [Russia's 500 R-37M Missile Plan Faces a Ukrainian Strike on Key Supplier, Defence Security Asia](https://defencesecurityasia.com/en/russia-r37m-500-missile-plan-ukraine-azov-strike/)
16. [Rusia pone en alerta a Estados Unidos con el misil aire-aire más peligroso, AS](https://as.com/actualidad/sociedad/rusia-pone-en-alerta-a-estados-unidos-con-el-misil-aire-aire-mas-peligroso-vuela-a-mach-6-y-tiene-capacidad-nuclear-n/)
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*Topic: Encyclopedia › Technology and the built world › Engineering and manufacturing › Missiles and rocketry › Air-to-air missiles*
*Initially written Sep 17, 2026 · Reviewed: Sep 18, 2026; Oct 15, 2026 · Edited: Sep 18, 2026; Oct 15, 2026 · Last review: Oct 15, 2026*
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