Two defense companies have successfully completed critical acceptance testing for an unmanned loitering munition system designed for U.S. Army use, marking a significant step toward fielding the weaponized technology across military units.
Mistral Inc., a Maryland-based defense contractor, and Uvision Inc. announced the completion of first-lot acceptance tests for the HERO 120 system on Aug. 4, 2026. The tests were conducted as part of the Army's Lethal Unmanned System program, which aims to modernize precision strike and reconnaissance capabilities.
According to the companies' joint announcement, all required acceptance test missions were completed successfully. The HERO 120 is described as a mid-range loitering munition—commonly called a "kamikaze drone"—designed to give tactical units precision strike capability while maintaining what the companies characterize as "operator control" throughout missions.
The successful testing represents a critical juncture in the program's development timeline. Acceptance testing is the formal gate through which defense systems must pass before the military can begin wider procurement and deployment.
Mistral describes itself as a U.S.-based systems integrator with more than three decades in the defense sector, working across unmanned systems, loitering munitions, robotics and force protection. Uvision, the design authority for the HERO system, brings expertise in developing loitering munitions.
Yoav Banai, senior vice president at Mistral Inc., emphasized the "shared commitment" of both companies to deliver "reliable, effective, and mission-ready capability to our warfighters." Jarmin Blanton, vice president of business development at Uvision, called the system "mature, reliable, and combat effective."
Loitering munitions occupy a contested space in military doctrine and international law. Unlike traditional missiles, which strike their target immediately upon arrival, loitering munitions can circle a target area, allowing operators time to observe and confirm targets before engagement. The Army's emphasis on maintaining operator control in the HERO 120 design reflects ongoing military and policy concerns about autonomous weapons systems.
The program's budget, timeline and planned deployment scale have not been disclosed.
