JASSM-ER
US Air Force stealth cruise missile with 1,000+ km range, primary long-range strike weapon in Iran.
Last refreshed: 5 April 2026 · Appears in 1 active topic
Can the US build JASSM-ERs faster than it fires them?
Latest on JASSM-ER
- How many JASSM missiles has the US fired at Iran?
- More than 1,000 JASSM-ER missiles in the first four weeks of Operation Epic Fury, equivalent to 2.5 years of normal production.Source: Iran Conflict 2026 update 59 / Bloomberg
- How long does it take the US to make more JASSM missiles?
- Annual production is 396 at standard rate or up to 860 at surge. At 1,000+ fired in 28 days, restocking takes 18-30 months even under surge production.Source: Bloomberg / Air & Space Forces Magazine
- Does the Iran war affect US ability to defend Taiwan?
- Yes. JASSM-ER stockpiles allocated to Pacific Command for a Taiwan contingency have been drawn down for the Iran campaign, leaving a significant restock gap.Source: Iran Conflict 2026 update 59
- What is the range of the JASSM-ER missile?
- The AGM-158B JASSM-ER has a range exceeding 1,000 km (600+ miles), allowing launch from aircraft well outside most air defence envelopes.Source: Lockheed Martin / AFSOC fact sheet
Background
The US has fired more than 1,000 JASSM-ER Cruise Missiles in the first four weeks of Operation Epic Fury, according to Bloomberg, drawing from stockpiles reserved for a potential Taiwan contingency. At that consumption rate, the Iran war Burns through 2.5 years of planned production every month, leaving an estimated 18-to-30-month restock gap even under surge conditions.
The AGM-158B JASSM-ER (Extended Range) is built by Lockheed Martin at its Troy, Alabama facility. Range exceeds 1,000 km (over 600 miles); each unit costs approximately .5 million. Standard annual production is 396 missiles; at full surge the line can reach 860 per year, shared with the LRASM anti-ship variant. Total funded inventory since 2009 stands at roughly 6,200 Rounds. The missile first saw combat in April 2018 against Syrian chemical weapons sites, where B-1B bombers launched 19 JASSM-ERs in a joint US-UK-French strike. It carries a 450 kg penetrating warhead and uses GPS/INS plus infrared terminal guidance, with low-observable shaping designed to defeat integrated air defences.
The Iran campaign has exposed a fundamental asymmetry in Western precision-strike capacity: a single sustained conflict can outrun the industrial base that supplies it. The diversion of Pacific Command stockpiles raises direct questions about US deterrence credibility toward Taiwan during the war. Lockheed secured an additional billion production contract in July 2025 to accelerate output, but lead times mean new missiles cannot arrive for 18 months or more.
