Lockheed Martin announced a new lower-cost interceptor for the Patriot air-defence system at the Farnborough Airshow on Monday, a direct response to the rapid depletion of allied missile stocks across two major conflict zones. The PAC-3 Adapted Capability Effector (ACE) will cost less than half the price of the current PAC-3 MSE interceptor, which US Army budget documents peg at roughly $4 million per round. Initial production could begin within 36 months, the company said, with development and manufacturing to be shared between American and European industrial partners.

The announcement lands as US Central Command data reveals the scale of the drawdown. By mid-June, American forces had expended more than half of their available Patriot missiles and over 45 percent of precision-strike munitions during operations linked to the Iran crisis. Separate US government documents indicate that fresh orders for PAC-3 MSE interceptors, placed after the conflict with Iran intensified in late February 2026, will not be delivered before the end of 2028. The production cycle for a repeat order runs approximately 30 months, and the two existing contracts with Lockheed Martin, worth $7.13 billion, will fund more than 1,600 interceptors for the US Army and foreign military sales customers.

Boeing, which supplies the seeker heads for the PAC-3 missile, plans to increase output by 30 percent this year to 850 units, matching the number of missiles Lockheed Martin intends to produce in 2026. That ramp-up, however, addresses the current-generation interceptor, not the newly unveiled ACE variant. Viewed from Washington, the cheaper interceptor is also a competitive move: established defence contractors face mounting pressure from start-ups that promise to deliver weapons faster, in larger quantities, and at a fraction of the cost of traditional systems.

The location of the announcement underscores the European dimension. Russia’s full-scale invasion of Ukraine has triggered a rearmament surge across the continent, making Patriot one of the most sought-after air-defence weapons globally. European governments are simultaneously seeking to expand local manufacturing and reduce reliance on American suppliers, a dynamic Lockheed Martin is navigating by bringing European partners into the ACE programme. The next milestone to watch is whether the 36-month development timeline holds, as militaries on both sides of the Atlantic weigh the gap between depleted stockpiles and the arrival of a more affordable interceptor.