IRIS-T SLM

Germany's medium-range air-defense missile system, combat-proven in Ukraine — a road-mobile, vertical-launch SAM with a highly successful record against cruise missiles and unmanned systems.

Overview

The IRIS-T SLM (Surface-Launched Medium-range) is a German mobile medium-range surface-to-air missile system developed by Diehl Defence and HENSOLDT. Part of the broader IRIS-T SL family, it uses a passive-infrared-seeking interceptor derived from the widely fielded IRIS-T air-to-air missile and an advanced 360-degree AESA radar. The system was rushed into the hands of Ukraine in October 2022—its first operational user—where it quickly proved itself against Russian cruise missile and drone barrages and became the most combat-validated Western medium-range SAM since the Gulf War. A dozen allied nations have followed with orders, making the SLM a cornerstone of European integrated air and missile defence.

Development

Diehl Defence developed the IRIS-T SLM as a surface-launched evolution of the IRIS-T air-to-air missile, integrating a larger booster, a vertical-cold-launch canister, and the HENSOLDT TRML-4D radar. The system was first shown in the mid-2010s and completed live-fire tests by 2021. When Russia’s full-scale invasion of Ukraine created an urgent need for modern point and area air defence, Berlin expedited delivery of the first fire unit; it arrived in Ukraine in October 2022, making the SLM an operational system years ahead of its planned entry into German service, as documented by Army Recognition. Serial production for both Ukraine and a rapidly growing order book from NATO and allied states is now underway at Diehl.

What comes next

IRIS-T SLM fills the middle layer between short-range gun systems and ballistic-missile defenses such as Patriot PAC-3. That role is likely to expand. European buyers need more launchers, larger interceptor stocks and a way to connect national sensors without creating a separate command system for every battery. The replacement question is therefore less about discarding IRIS-T than about adding range, magazine depth and cheaper effectors around it. BattlePolicy's analysis of Europe's Patriot alternatives describes the pressure to build that stack with European and Ukrainian production.

Diehl Defence builds the IRIS-T missile family. Hensoldt supplies radar options used in German configurations, while Rheinmetall provides guns and sensors for the lower tier. MBDA's SAMP/T and Aster family compete higher in the architecture, particularly against ballistic threats. The durable system will be the one that can accept tracks from multiple radars and assign each target to the least costly effective interceptor. More range helps, but sustainable missile output and common command software determine how long the network can fight.

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