U.S. Marine Corps L-MADIS

History

The U.S. Marine Corps Light Marine Air-Defense Integrated System, commonly written as L-MADIS or LMADIS, is a mobile counter-unmanned aircraft system. It combines sensors, radar, command-and-control equipment, electronic warfare systems, and communications on two lightweight tactical vehicles.

L-MADIS is designed for expeditionary units that require a counter-drone capability with a smaller transport and logistics burden than a conventional air-defense battery. Its operators perform the complete sequence of detecting, tracking, identifying, and defeating an unmanned aircraft.

The system is associated with the Marine Corps Ground Based Air Defense program and complements the larger JLTV-mounted Marine Air Defense Integrated System. Its lightweight vehicles can accompany Marine Expeditionary Units aboard amphibious ships and can be transported ashore by aircraft.

Development

The Marine Corps began adapting its ground-based air-defense organization as small commercial drones became a more serious battlefield threat. Such aircraft could conduct reconnaissance, direct weapons, or carry explosive payloads while presenting a small radar signature.

Several technologies used in early L-MADIS configurations originated in earlier Ground Based Air Defense work. In June 2014, the U.S. Office of Naval Research selected the RADA RPS-42 radar for a mobile directed-energy air-defense development program. In October 2015, Sierra Nevada Corporation received a Marine Corps contract for Modi II electronic countermeasure systems. These technologies helped establish the sensor and electronic-warfare architecture later associated with L-MADIS.

By June 2018, forward-deployed Marines were employing a Ground Based Air Defense counter-UAS system developed during the preceding two years. The equipment allowed Low Altitude Air Defense personnel to detect, identify, track, and defeat small unmanned aircraft by kinetic or non-kinetic means. This is the earliest supported year in which the L-MADIS concept had become a recognizable fielded system.

Early descriptions identified L-MADIS as a pair of Polaris MRZR vehicles. One carried the command-and-control and sensor equipment, while the other carried the electronic-warfare equipment. An early sensor arrangement included an RPS-42 S-band active electronically scanned array radar, a gyro-stabilized CM202 electro-optical sensor, and a Modi jammer. A technical overview of this configuration is available from GlobalSecurity.org.

Later development

The system continued to evolve as the Marine Corps introduced newer sensors, communications equipment, and electronic-warfare components. By 2026, the documented configuration used the Skyview MPV-3 detection sensor, an RPS-62 radar, Link 16 communications, and the portable MFEW-D jammer.

In July 2026, the Marine Corps selected the Allen Control Systems Bullfrog M240 robotic weapon station for prototype integration with L-MADIS. The initial contract was valued at approximately $6.2 million. The weapon station adapts a 7.62 mm M240 machine gun to provide a stabilized kinetic response against small drones. According to the manufacturer, the station weighs approximately 136 kg without ammunition and can fire as many as 850 rounds per minute. The selection was reported by Breaking Defense.

The Bullfrog configuration remained a prototype integration project in July 2026. Available reporting did not indicate that it had been installed on the systems fielded aboard USS Makin Island.

Design

Vehicle arrangement

L-MADIS consists of two Ultra-Light Tactical Vehicles operating as a coordinated pair. Contemporary reporting identifies the vehicles as Polaris MRZR all-terrain vehicles. Their compact dimensions and off-road mobility allow them to be moved by Marine Corps aircraft and deployed across difficult terrain.

The system requires four Low Altitude Air Defense gunners. One vehicle performs the command-and-control function. It receives sensor information and directs the second vehicle, which carries the equipment used to conduct electronic-warfare attacks against unmanned aircraft.

This division distributes the system across two small platforms rather than concentrating every component on one heavier vehicle. The arrangement supports rapid movement between amphibious ships, landing areas, forward positions, command posts, and other sites requiring short-range protection from drones.

Detection and tracking

In the configuration documented by the 13th Marine Expeditionary Unit in August 2026, the Skyview MPV-3 sensor detects unmanned aircraft at distances of up to 3,000 m. It examines relevant radio frequencies to help operators classify the aircraft and select an appropriate electronic response.

After detection, an RPS-62 radar measures the target's movement and distance. Four hemispheric radar panels provide a combined 360-degree field of coverage. The radar transmits radio-frequency energy and processes the signals reflected by the target.

Earlier L-MADIS descriptions referred instead to the RPS-42 hemispheric surveillance radar. The RPS-42 is an S-band, pulse-Doppler active electronically scanned array radar designed to detect small, low-flying aircraft. The difference between the documented RPS-42 and RPS-62 installations reflects the evolution of the system rather than two specifications for one unchanged configuration.

Command, control, and communications

Integrated Link 16 communications allow L-MADIS to transmit track information in real time to an amphibious ship or a command post. This permits the system's observations to support a wider air-defense picture rather than remaining available only to the four-person vehicle team.

The command vehicle coordinates detection, classification, tracking, and engagement. The architecture is intended to shorten the interval between the initial detection of a drone and the selection of a suitable response.

Electronic attack

The 2026 configuration uses the MFEW-D, a lightweight portable electronic jammer. Once operators identify a hostile target, the jammer blocks or disrupts radio frequencies and communications associated with the aircraft. The intended result is to break the control link between the drone and its operator and force the aircraft away from its planned flight path.

Electronic attack offers a non-kinetic method of defeating radio-controlled drones without launching an interceptor or creating weapon debris near protected personnel and equipment. Its effectiveness depends on the target's control architecture. A preprogrammed or autonomous aircraft, or a drone using a sufficiently resistant communications link, may require a kinetic effector or another layer of air defense.

Planned kinetic capability

The planned Bullfrog M240 installation is intended to provide a lower-cost kinetic response when electronic warfare is ineffective or unsuitable. Its stabilized remote mount uses an M240 machine gun and is intended to detect and engage small unmanned aircraft. The prototype effort does not establish the Bullfrog as an operational component of every L-MADIS system.

Operational history

Forward-deployed Marines were using the developing counter-UAS system by June 2018. Low Altitude Air Defense personnel employed it to extend detection and engagement beyond the range offered by earlier handheld, directionally aimed counter-drone devices.

On 22 May 2025, two L-MADIS vehicles operated by personnel from the 2nd Low Altitude Air Defense Battalion monitored the area around USS San Antonio during a simulated strait transit in the Atlantic Ocean. The event demonstrated the use of the lightweight land system as part of an amphibious formation.

In 2026, the 13th Marine Expeditionary Unit fielded L-MADIS aboard the Wasp-class amphibious assault ship USS Makin Island off California. Marines from the 3rd Low Altitude Air Defense Detachment, attached to Marine Medium Tiltrotor Squadron 364 Reinforced, used the system during simulated counter-UAS scenarios at sea. The 13th Marine Expeditionary Unit described the fielding on 3 August 2026.

The shipboard training integrated L-MADIS into the unit's underway procedures while retaining its ability to deploy ashore. The vehicles can protect landing zones, forward command posts, aviation support locations, and expeditionary positions after movement from the ship. Contemporary accounts of the deployment were also published by Army Recognition and Defence Industry Europe.

L-MADIS provides a short-range counter-drone layer rather than a complete naval or land-based air-defense system. It does not replace shipboard surveillance radars, surface-to-air missiles, or close-in weapon systems intended to counter larger aircraft, anti-ship missiles, or saturation attacks.

Configurations

• Early L-MADIS configuration: A paired MRZR-based counter-UAS system described with an RPS-42 radar, CM202 electro-optical sensor, and Modi electronic jammer.
• 2026 L-MADIS configuration: A two-vehicle system using the Skyview MPV-3 detector, four-panel RPS-62 radar, Link 16 communications, and MFEW-D electronic jammer.
• L-MADIS with Bullfrog M240: A planned prototype configuration adding a stabilized 7.62 mm robotic weapon station as a kinetic counter-drone effector.

Operators

• United States Marine Corps: Operated by Low Altitude Air Defense personnel in support of Marine expeditionary and amphibious forces.

Specifications (2026 L-MADIS configuration)

General characteristics

• Type: Mobile counter-unmanned aircraft system
• Platforms: Two Ultra-Light Tactical Vehicles identified as Polaris MRZR all-terrain vehicles
• Crew: Four Low Altitude Air Defense gunners
• Vehicle functions: One command-and-control vehicle and one electronic-warfare vehicle
• Transportability: Air-transportable by Marine Corps aircraft

Sensors and communications

• Detection sensor: Skyview MPV-3
• Stated detection range: Up to 3,000 m
• Tracking radar: RPS-62 with four hemispheric panels
• Radar coverage: 360 degrees
• Data link: Link 16

Effectors

• Operational non-kinetic effector: MFEW-D portable electronic jammer
• Method of defeat: Disruption of hostile radio frequencies and drone control communications
• Planned kinetic effector: Bullfrog M240 robotic weapon station under prototype integration
• Bullfrog weapon: 7.62 mm M240 machine gun
• Bullfrog weight: Approximately 136 kg without ammunition
• Bullfrog maximum rate of fire: Up to 850 rounds per minute