M30/M31 GMLRS

M30/M31 GMLRS. The M30 and M31 are precision-guided artillery rockets for the Guided Multiple Launch Rocket System (GMLRS), a cornerstone of modern United States Army and United States Marine Corps long-range fires. Developed by Lockheed Martin, these rockets provide highly accurate, all-weather strike capability against area and point targets, launched from the M270 MLRS and M142 HIMARS platforms. Their introduction marked a revolutionary shift from unguided M26 rockets to precision engagement, dramatically reducing collateral damage and logistical burden.

Overview

The M30/M31 GMLRS family represents a transformative advancement in field artillery, integrating GPS and an inertial navigation system for exceptional accuracy. This guidance package allows a single rocket to achieve effects previously requiring dozens of unguided rounds, fundamentally changing battlespace dynamics. The system is a key component of the U.S. Department of Defense's investment in network-centric warfare, enabling rapid engagement of time-sensitive targets relayed by forward observers, unmanned aerial vehicles, or other ISTAR assets. Its deployment on both the tracked M270 MLRS and wheeled M142 HIMARS provides operational flexibility across diverse theaters, from the deserts of Iraq to the forests of Europe.

Development and variants

Development of the GMLRS began in the late 1990s under a joint U.K.-U.S. program, with Lockheed Martin winning the contract to upgrade existing M26 rockets. The initial variants were the M30, carrying DPICM submunitions, and the M31, with a unitary high-explosive warhead. Following the 2008 Convention on Cluster Munitions, the submunition-carrying M30 was phased out. It was replaced by the M30A1 Alternative Warhead (AW), which disperses approximately 180,000 pre-formed tungsten fragments to mimic area effects without unexploded ordnance hazards. Subsequent improvements led to the M31A1, featuring a safer insensitive munition-compliant rocket motor, and the M31A2 with further reliability enhancements. Ongoing development includes the Extended Range GMLRS (ER GMLRS) and the Precision Strike Missile (PrSM) for even greater ranges.

Operational history

The M31 unitary rocket saw extensive combat use during the War in Afghanistan and the Iraq War, where its precision proved invaluable in urban and mountainous terrain for close support of ISAF and OIF troops. It has been widely exported to allies including the United Kingdom, Italy, Germany, and Finland. Most notably, following the 2022 Russian invasion of Ukraine, the United States and allies provided M142 HIMARS launchers and large quantities of M31 rockets to the Armed Forces of Ukraine. Their use in campaigns such as the Battle of Kherson and strikes against key logistics nodes like the Antonivka Road Bridge demonstrated a profound impact, crippling Russian supply lines and shifting artillery dynamics on the Eastern Front. The system's performance in Ukraine has solidified its reputation as a pivotal asymmetric warfare tool.

Specifications

The rocket is approximately 13 feet (4.0 m) long, 9 inches (227 mm) in diameter, and weighs about 600 pounds (272 kg). It is powered by a solid-fuel rocket motor, achieving speeds over Mach 2.5 and a maximum range exceeding 92 kilometers for latest variants. Guidance is provided by a combined GPS/INS unit, yielding a circular error probable of less than 10 meters. The M31 unitary warhead contains roughly 200 pounds (90 kg) of high-explosive, while the M30A1 Alternative Warhead uses a blast-fragmentation design. The rockets are packaged in six-round pods for the M142 HIMARS or two pods for the M270 MLRS, and are compatible with the MLRS Fire Control System.

See also

* M270 MLRS * M142 HIMARS * Extended Range GMLRS * Precision Strike Missile * Army Tactical Missile System * High Mobility Artillery Rocket System * Field artillery * 2022 Russian invasion of Ukraine

Category:Rockets and missiles Category:Multiple rocket launchers Category:Military equipment of the United States