AGM-158 JASSM

America's premier low-observable air-launched standoff cruise missile, delivered in short-, extended- and extreme-range variants, and the weapon that consumed the largest inventory share in the 2026 Iran campaign.

Overview

The AGM-158 Joint Air-to-Surface Standoff Missile (JASSM) is a family of subsonic, stealthy cruise missiles produced by Lockheed Martin. Designed to penetrate advanced integrated air-defence systems, the missile uses a low-radar-cross-section airframe, GPS/INS mid-course guidance, and an imaging infrared (IIR) terminal seeker with automatic target recognition. The baseline AGM-158A entered service in 2003; the extended-range AGM-158B JASSM-ER stretches that envelope to roughly 925–1,000 km, and the in-development AGM-158D (JASSM-XR) targets ranges beyond 1,600 km. JASSM became the principal long-range standoff weapon of the 2026 US–Israel war on Iran, where more than 1,000 missiles were fired in the first month alone, triggering a massive recapitalisation drive.

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