Air Defense

61-K 37 mm anti-aircraft gun

The 61-K is a Soviet 37 mm automatic anti-aircraft gun built as a mobile, clip-fed short-range air-defense weapon. In the Yemen Civil War context, open-source reporting places 37 mm 61-K guns in Yemen's inherited anti-aircraft artillery inventory and describes Houthi-aligned forces using small-caliber anti-aircraft guns for both low-altitude air defense and ground fire.

Conflict side
Houthi-aligned forces
Built by
Soviet state arsenals, including Plant No. 8 development lineage
Built in
Soviet Union
61-K 37 mm anti-aircraft gun, Towed 37 mm automatic anti-aircraft gun, Air Defense

Service History

In service
Entered Red Army service in 1939; exported and copied after World War II
Used by
Houthi-aligned forces, Yemeni armed forces legacy air-defense units
Wars
Yemen Civil War

Production History

Designer
Mikhail Loginov, I. A. Lyamin, and L. V. Lyulyev at Plant No. 8
Designed
1938-1939
Built by
Soviet state arsenals, including Plant No. 8 development lineage
Built in
Soviet Union
Unit cost
Not publicly available
Produced
1939-1945 in Soviet wartime production, with postwar foreign copies
Number built
About 20,000 Soviet-produced guns, with additional foreign production
Variants
61-K M1939 single-barrel towed gun, Type 55 Chinese single-barrel copy, Naval 70-K derivative

Specifications

Caliber
37x252 mmSR
Crew
8
Weight
About 2,100 kg in firing position
Rate of fire
About 160-170 rounds per minute cyclic; practical rate lower
Muzzle velocity
About 880 m/s
Effective ceiling
About 3,000-4,000 m against aircraft, depending on source and engagement conditions
Traverse
360 degrees
Elevation
-5 to +85 degrees
Feed
Manually fed five-round metal clips

Conflict Usage

Yemen Civil War
Side: Houthi-aligned forcesRole: Short-range anti-aircraft and ground fireair defense

Yemen's pre-2015 anti-aircraft artillery inventory included 37 mm 61-K guns alongside 57 mm S-60/AZP-57 pieces; reporting on Houthi-controlled air-defense forces describes small-caliber anti-aircraft guns being fired mainly against personnel and equipment, while still posing a short-range threat to aircraft and drones.

61-K 37 mm anti-aircraft gun Images

Related Weapon Systems

ZU-23-2, Towed twin 23 mm anti-aircraft autocannon, Air DefenseAir DefenseZU-23-2Towed twin 23 mm anti-aircraft autocannonThe ZU-23-2 is a Soviet twin 23 mm towed anti-aircraft autocannon built around two 2A14 guns on a light carriage. Its manual sighting, rapid emplacement, and high volume of fire make it a close-range air-defense weapon against low-flying aircraft, helicopters, and drones, while many operators also use it for direct fire against light vehicles and infantry positions. Armenian-side losses in the 2020 Nagorno-Karabakh fighting included towed and vehicle-mounted ZU-23 guns, Ukrainian units have kept the system relevant in mobile and positional air-defense teams during the Russia-Ukraine War, and UN reporting documented Houthi ZU-23 gun fire during the Yemen Civil War.
2K12 Kub / Kvadrat / SA-6 Gainful, Tracked medium-range surface-to-air missile system, Air DefenseAir Defense2K12 Kub / Kvadrat / SA-6 GainfulTracked medium-range surface-to-air missile systemThe 2K12 Kub, exported as Kvadrat and known to NATO as SA-6 Gainful, is a Soviet tracked medium-range surface-to-air missile system built around 3M9 missiles, 2P25 launch vehicles, and the 1S91 Straight Flush radar. In recent conflict archives it appears as a legacy medium-range air-defense system, including Syrian use during the 2018 missile strikes, Armenian use in Nagorno-Karabakh, and a Houthi SA-6/Kub-family engagement that downed a U.S. MQ-9 over Yemen in 2019.

Sources