U.S. Army and Kratos Advance J85-Powered MQM-178 Firejet as Part of Low-Cost High-Speed Drone Fleet Strategy.

Kratos and the U.S. Army have pushed the MQM-178 Firejet into a more capable class with a J85-powered variant that delivers greater speed, range, endurance, and climb performance at a cost intended to stay below $500,000. The upgrade reinforces the push to field affordable jet-powered drones in larger numbers for training, decoy, and tactical missions where mass, speed, and acceptable attrition now carry growing battlefield value.

The new MQM-178 Firejet Mk1 pairs a higher-performance engine with an established airframe already used to emulate fast aerial threats, giving U.S. forces a more demanding target and a more flexible tactical platform without the price of larger jet UAVs. Backed by domestic engine production, it also fits a broader shift toward scalable unmanned combat mass, faster replacement cycles, and more resilient supply chains for future high-intensity operations.

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Kratos Defense & Security Solutions and the U.S. Army have flight-tested a J85-powered MQM-178 Firejet Mk1, boosting speed, range and climb while keeping the tactical jet drone in a sub-$500,000 class aimed at scalable, attritable operations (Picture Source: Kratos)

The immediate development is not simply the installation of a new engine, but the creation of a second MQM-178 Firejet configuration designed for users who require greater speed, range, endurance and climb performance than the long-running Classic Firejet. Kratos states that the MQM-178 Firejet Mk1 is powered by its J85 engine and positioned as a first-to-market tactical jet UAS in the high-performance sub-$500,000 class, a segment that remains largely unoccupied between expendable propeller-driven drones and significantly more expensive jet-powered systems. This positioning places the platform within emerging U.S. doctrine aimed at fielding large numbers of lower-cost jet-capable unmanned systems able to operate alongside or in support of crewed aircraft. At the same time, the company’s Spartan engine facility, opened in late 2025, is ramping up production for the J85 and related engines toward far higher output over the next few years, indicating a deliberate move toward scalable manufacturing aligned with anticipated demand.

The MQM-178 Firejet already occupies a distinctive position within the unmanned aircraft landscape. Kratos describes it as a carbon-fiber composite aerial target with modular payload space, a top speed of 0.69 Mach, a service ceiling of 35,000 feet, low-level flight down to 20 feet above ground level, and maneuverability ranging from -2g to 9g. It can carry a 70-pound internal payload, operate in manual or pre-programmed modes, launch pneumatically from land or ship without rocket-assisted takeoff systems, and be recovered by parachute, while its control architecture can manage up to eight drones simultaneously. In operational terms, these characteristics allow the MQM-178 to replicate high-subsonic threats with greater fidelity than slower systems, conduct complex multi-axis training scenarios, and support test and evaluation activities involving radar, missile and sensor systems through RF and IR augmentation payloads.

Its operational history helps explain why Kratos and the Army chose to build on this airframe rather than starting from a clean-sheet design. Kratos states that the MQM-178 Firejet was first unveiled in 2011 and has long supported Army, Air Force and naval training in both surface-to-air and air-to-air scenarios. The Classic Firejet, powered by JetCat engines, has been progressively adapted to reflect evolving threat environments and customer requirements, particularly in the field of realistic adversary emulation. This continuity reduces integration risk for the MQM-178 Firejet Mk1 while preserving established logistics, launch procedures and training doctrines. At the same time, the evolution of the platform into Taiwan’s Mighty Hornet IV attack UAV illustrates a broader transition from pure target systems toward operationally relevant jet-powered unmanned platforms capable of fulfilling tactical roles.

The J85-powered MQM-178 Firejet Mk1 could expand the platform’s value in two directions simultaneously. For training, higher speed and improved climb performance should provide a more demanding target profile, reducing reaction time for air defense systems and increasing realism in engagement scenarios. For tactical use, the same performance envelope supports missions such as decoy operations, radar stimulation, distributed sensor deployment or limited strike support, particularly in contested environments where survivability is measured in mission effectiveness rather than platform recovery. This positions the MQM-178 Firejet within a growing category of systems that bridge the gap between traditional target drones and operational unmanned combat aircraft, especially within concepts involving distributed operations and saturation tactics.

The industrial dimension further reinforces the relevance of the program. Kratos highlights that the J85-powered MQM-178 configuration relies on a U.S.-manufactured engine with domestically sourced components, directly addressing supply chain vulnerabilities that have become more visible in recent years. This approach reflects a broader shift in defense industrial policy toward localized production and reduced dependency on external suppliers, particularly for critical subsystems such as propulsion. In a context where production timelines and component availability can constrain operational readiness, the ability to control engine manufacturing at scale provides a strategic advantage. It also aligns with U.S. efforts to rebuild industrial capacity capable of supporting sustained operations rather than short-duration contingencies.

The geostrategic outlook for future deployment of the MQM-178 Firejet is broad. In Europe, the war in Ukraine has reinforced the importance of scalable unmanned systems and realistic training environments capable of simulating fast-moving aerial threats. In the Indo-Pacific, where operational distances and contested environments require flexible and resilient force structures, compact jet-powered UAS in this category may serve both as training assets and as tactical systems within distributed force concepts. Taiwan’s Mighty Hornet IV development illustrates how regional actors are already adapting such platforms to operational roles. In other regions facing persistent missile and drone threats, the same systems offer a means to combine training, deterrence and operational experimentation within a single platform family.

The broader market trend behind the MQM-178 Firejet Mk1 reflects a shift toward rebuilding combat mass after years of emphasis on limited numbers of high-cost systems. U.S. and allied inventories have been reduced by sustained operational commitments, while recent conflicts have demonstrated the rapid consumption rate of unmanned systems and precision munitions. This environment is driving demand for platforms that can be produced in large quantities, adapted quickly and deployed without the financial and industrial constraints associated with traditional airpower assets. Within this framework, the MQM-178 Firejet’s positioning in a lower-cost jet category, combined with scalable engine production, aligns with a demand model centered on volume, flexibility and rapid recapitalization. It also reflects a broader design philosophy increasingly visible across U.S. programs, where affordability is treated as an enabling capability rather than a limiting factor.

Kratos and the U.S. Army are using the J85-powered MQM-178 Firejet to signal more than a propulsion upgrade. They are pointing toward a model of airpower built on speed, adaptable mission design, domestic engine production and acceptable attrition rates within a controlled cost structure. The MQM-178 Firejet Mk1 illustrates how a platform originally designed for training can evolve into a multi-role system aligned with emerging doctrines centered on distributed operations and scalable unmanned mass, offering insight into how Western forces may structure portions of their future aerial capabilities.

Written by Teoman S. Nicanci – Defense Analyst, Army Recognition Group

Teoman S. Nicanci holds degrees in Political Science, Comparative and International Politics, and International Relations and Diplomacy from leading Belgian universities, with research focused on Russian strategic behavior, defense technology, and modern warfare. He is a defense analyst at Army Recognition, specializing in the global defense industry, military armament, and emerging defense technologies.