President Trump signed a presidential memorandum during his first term directing the Secretary of Defense to use Section 303 of the Defense Production Act to expand domestic production of inert materials for munitions. The determination, published in the Federal Register on March 15, 2019, declared that American industry could not supply these materials adequately or on time without direct presidential intervention. That decision set in motion a federal effort to close gaps in the munitions supply chain, but whether it translated into faster delivery of finished ammunition to the military remains an open and consequential question.
Section 303 and the Bottleneck in Munitions Materials
The core problem was straightforward: the United States lacked sufficient domestic capacity to produce the inert components that go into conventional munitions. These are not warheads or explosives but the casings, bodies, and structural elements without which finished rounds cannot be assembled. The presidential memorandum to the Secretary of Defense stated that domestic production capability for inert materials for munitions “is essential to national defense” and that “without Presidential action” the private sector could not close the gap.
Section 303 of the Defense Production Act gives the president authority to create, expand, or preserve domestic industrial capacity when market forces alone will not meet national security needs. The provision allows the federal government to offer purchase commitments, loan guarantees, and direct investment to private manufacturers. It is one of the most direct tools available to force production scaling outside of wartime mobilization, and invoking it signals that normal procurement channels have failed to keep pace with demand.
The Congressional Research Service has documented long-running constraints in the ammunition industrial base, including aging government-owned facilities, limited competition among suppliers, and surges in demand that outstrip the ability of existing plants to ramp output. These structural weaknesses meant that even before the 2019 determination, the Pentagon faced recurring shortfalls in ammunition stocks. The Section 303 action targeted one specific choke point in that chain: the raw and semi-finished inert materials that feed into assembly lines.
Inert materials sound mundane, but they are central to modern warfare logistics. Steel bodies for artillery shells, metal components for bomb casings, and other structural parts must meet tight tolerances and be produced at scale. If those inputs are delayed, the entire assembly process slows, regardless of how many explosives or guidance kits are available. By designating inert materials as a critical shortfall, the White House effectively acknowledged that even basic metalworking capacity had become a strategic vulnerability.
How the DPA Has Been Applied Across Federal Agencies
The 2019 inert-materials determination did not exist in isolation. The Government Accountability Office tracked the use of Defense Production Act authorities across multiple agencies from fiscal years 2018 through 2024 in a report on DPA implementation. That review covered not just munitions but also critical minerals, medical supplies, and energy infrastructure, all areas where the federal government has turned to DPA tools to address supply shortfalls.
The GAO’s findings provide the broadest available window into how Section 303 and related authorities have actually been implemented. Agencies have used the act to fund feasibility studies, subsidize new production lines, and enter into purchase agreements that guarantee demand for manufacturers willing to invest in capacity. The challenge, as the GAO documented, is that these actions often take years to produce measurable output gains. Building or retooling a factory is not instantaneous, and the gap between a presidential determination and the first delivery of new material can stretch well beyond a single budget cycle.
The legal framework also includes provisions under 50 U.S. Code Section 4558 for voluntary agreements between the government and private industry. These agreements carry antitrust protections, allowing competing manufacturers to coordinate production plans without running afoul of federal competition law. The Department of Justice plays a defined role in reviewing and approving such arrangements. Whether any voluntary agreements were executed specifically for inert munitions materials following the 2019 determination is not confirmed in publicly available records.
Across sectors, agencies have faced recurring obstacles when trying to move from legal authority to practical effect. GAO has highlighted staffing constraints inside the offices that manage DPA projects, the need to coordinate among multiple program managers and contracting officers, and the difficulty of tracking outcomes once funds are disbursed. These same hurdles likely apply to the inert materials initiative, even if documentation specific to that program has not surfaced in the public record.
What the Public Record Does Not Yet Show
The strongest gap in the evidence concerns outcomes. The presidential memorandum and its Federal Register publication confirm that the legal process was followed and the determination was made. But no publicly available document ties the 2019 action to specific contract awards, production volume increases, or faster delivery timelines for finished munitions.
Testing whether the Section 303 determination produced real results would require matching it against Department of Defense budget execution data from fiscal year 2020 onward, including obligation rates for ammunition procurement accounts and delivery schedules from prime contractors. That data exists inside the Pentagon’s financial systems but has not been released in a form that allows direct comparison. The CRS background on ammunition production capacity identifies the structural problems, yet it does not trace the effects of any single DPA action through to delivery.
The distinction matters because a presidential determination is a legal trigger, not a production outcome. It authorizes the Defense Department to spend money and enter agreements, but it does not guarantee that factories will be built, workers hired, or materials shipped. The history of DPA actions across sectors shows a pattern where announcements generate attention but follow-through depends on sustained funding, agency execution, and industry willingness to invest in capacity that may not be commercially viable once defense demand subsides.
For defense contractors, military planners, and lawmakers, that uncertainty complicates decisions about future investments. If Section 303 interventions reliably shorten lead times and expand capacity, they become a powerful tool for shaping the industrial base. If, instead, they produce fragmented projects with limited impact, then relying on them to fix critical bottlenecks in munitions production may be misguided. At present, the public record around the 2019 inert materials determination offers more clarity about intent than about results, leaving the real-world effectiveness of this particular use of the Defense Production Act still largely untested in the open-source evidence.
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*This article was researched with the help of AI, with human editors creating the final content.
