A new analysis says the United States will need years to rebuild stocks ofkey advanced weapons used during the Iran war. The findings have renewed debate over military readiness and industrial capacity amid concerns about future conflicts.
The report points to long production timelines for systems central to U.S. deterrence strategy and highlights how rebuilding inventories may extend well beyond immediate wartime needs.
The United States has enough munitions for current operational scenarios linked to the Iran war, but restoring inventories of some of its most heavily used systems could take years, according to a new analysis released by the Center for Strategic and International Studies (CSIS).
The report focuses onthree categories of weapons: Tomahawk cruise missiles, Patriot missile interceptors, and THAAD interceptors. These systems played a major role during military operations involving Iran and now represent a longer-term challenge for U.S. defense planning.
Production Timelines Expose Limits of Industrial Capacity
According to CSIS, replenishing inventories is constrained less by funding than by manufacturing speed and industrial capacity. The think tank stated that contractors will require atleast three years to rebuild stockpiles of the three systems examined, despite expanded defense spending.
The report evaluates conditions under the Trump administration’s proposed $1.5 trillion defense budget for 2027, which accelerates investments in high-end munitions. CSIS noted that bipartisan support exists in Congress for increasing inventories but argued that rebuilding cannot happen immediately because production expansion takes time.
CSIS estimated that more than 1,000 Tomahawk missiles were fired during the Iran war and that returning inventories to prewar levels could take until late 2030. The report said fewer than 200 Tomahawks are currently produced annually due to historically low procurement volumes.
RTX, Raytheon’s parent company, declined to comment directly on the findings but pointed to investments totaling several billion dollars aimed at increasing output, including expanded facilities in Alabama and Arizona.
For missile defense systems, the analysis estimated that replacing as many as 290 THAAD interceptors could extend through the end of 2029, while replenishing more than 1,000 Patriot interceptors may continue until mid-2029.
Strategic Concerns Extend beyond Current Conflicts
According to the report, depleted inventories have created what CSIS described as a “window of vulnerability” in the event of a future conflict in the western Pacific, particularly given continuing military planning related to China and Taiwan.
China has stated that its military should be capable of taking Taiwan by force if necessary by 2027, although experts cited in the source described that objective as aspirational rather than a fixed deadline. Chinese PresidentXi Jinping also warned earlier this month that deteriorating relations over Taiwan could lead to confrontation with Washington.
Pentagon officials rejected suggestions that current readiness has been compromised. Chief Pentagon spokesman Sean Parnell said the military retains sufficient capabilities and stated that operations have continued successfully across combatant commands.
Military analysts cited in the source offered a different emphasis. Virginia Burger of the Project On Government Oversight said officials were likely aware that participation in the Iran conflict would significantly reduce available stockpiles.
According to CSIS senior adviser Mark Cancian, part of the current challenge traces back to post-Cold War assumptions that future wars would remain short and regional, limiting demand for large inventories of advanced weapons. He said recent conflicts have altered those expectations, but rebuilding supply chains and production capacity remains a slow process.
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