Boeing is set to significantly increase production of the PAC-3 Missile Segment Enhancement (MSE) interceptor’s seeker under an approximately $14.7 billion contract from Lockheed Martin, supporting efforts to expand US air and missile defense capacity.
The agreement formalizes a seven-year framework announced in April between Boeing and the Pentagon and supports the US military’s Acquisition Transformation Strategy and Arsenal of Freedom initiative.
To meet growing demand for PAC-3 MSE interceptors, Boeing has invested in expanding its seeker manufacturing facility, modernizing production infrastructure and processes, and strengthening relationships across its supplier network. These measures are intended to enable a substantial increase in output while improving manufacturing efficiency.
PAC-3 MSE Production Expansion
Lockheed Martin, the prime contractor for the programme, developed the PAC-3 MSE as an advanced hit-to-kill interceptor integrated into the Patriot air defense system. The interceptor is designed to engage a range of threats, including aircraft, cruise missiles and ballistic missiles.
Demand for PAC-3 MSE interceptors has increased significantly amid sustained military requirements arising from the war in Ukraine and escalating conflicts in the Middle East, placing additional pressure on existing interceptor inventories.
In January 2026, Lockheed Martin and the Pentagon signed a framework agreement aimed at increasing PAC-3 MSE production more than threefold over seven years. The plan would raise annual output from approximately 600 to around 2,000 missiles.
L3Harris, a key PAC-3 MSE subcontractor responsible for supplying the interceptor’s propulsion systems, has also received a $4.7 billion contract to expand its production capacity.
Lower-Cost PAC-3 Alternative
Lockheed Martin is also broadening the Patriot interceptor portfolio with the PAC-3 Adapted Capability Effector, unveiled in July as a lower-cost complementary interceptor.
The new variant is designed to help militaries address a wider range of air and missile threats while costing less than half as much as the PAC-3 MSE. The addition is intended to complement the higher-end PAC-3 MSE and provide greater flexibility as demand for integrated air and missile defense systems continues to rise.
The combined production investments by Boeing, Lockheed Martin and L3Harris highlight the growing emphasis on expanding interceptor manufacturing capacity and strengthening the US industrial base for advanced air and missile defense systems.
