Air Defense

M167 Vulcan

The M167 Vulcan is a U.S.-origin towed short-range air-defense gun built around the 20 mm M168 six-barrel rotary cannon. In Yemen, Houthi forces have been documented using captured Vulcan guns on improvised vehicle mounts, giving the system a mobile direct-fire role alongside its original close-in air-defense function.

Conflict side
Houthi-aligned forces
Built by
U.S. Army Weapons CommandGeneral Electric
Built in
United States
M167 Vulcan, Towed 20 mm short-range anti-aircraft gun, Air Defense

Profile

Type
Towed 20 mm short-range anti-aircraft gun
Conflict side
Houthi-aligned forces
Origin
United States
Service note
Introduced in the late 1960s; retired from U.S. service but retained by export users and captured stocks
air defenseanti-aircraft artillery20 mmrotary cannontechnical

Service History

In service
First fielded in U.S. service in the late 1960s; withdrawn from U.S. service but still seen with foreign operators and captured stocks
Used by
Houthi-aligned forces, Yemeni military stocks, United States Army, Export operators
Wars
Yemen Civil War

Production History

Designer
Rock Island Arsenal
Designed
1964-1965
Built by
U.S. Army Weapons CommandGeneral Electric
Built in
United States
Unit cost
$5,380 per unit in 1975, reported by WeaponSystems.net
Produced
1967 onward
Number built
626 reported U.S.-origin systems, with additional licensed production reported in South Korea
Variants
M167, M167A1, M167A2 PIVADS
Developed from
M61 Vulcan aircraft cannon
Developed into
M163 Vulcan self-propelled air-defense system used the related Vulcan gun concept on an M113 chassis

Specifications

Crew
One gunner on the mount, with towing vehicle and ammunition support required
Armament
20 mm M168 six-barrel rotary cannon firing 20x102 mm ammunition
Rate of fire
Selectable 1,000 or 3,000 rounds per minute
Weight
About 1,583 kg in travel configuration for the M167A1
Fire control
Manual aiming aided by an AN/VPS-2 range-only radar on standard M167A1 systems
Mobility
Two-wheel towed carriage with outriggers and auxiliary power unit; Yemeni conflict imagery shows captured guns adapted to vehicle mounts
Effective range
Published references list roughly 1.2 km against aerial targets, with ground-target range dependent on mode and source

Conflict Usage

Yemen Civil War
Side: Houthi-aligned forcesRole: Mobile direct fire and short-range air defenseair defensestrike

Houthi forces used captured M167 Vulcan guns during the Yemen Civil War, including examples mounted on Toyota Hilux technicals, an M54-series truck, and a BTR-152; reporting assessed their main observed use as ground fire against coalition-backed forces while retaining limited short-range air-defense utility.

M167 Vulcan Images

Related Weapon Systems

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