The Hellhound S3 UAS is a rapidly producible, 3D-printed loitering munition developed by Cummings Aerospace to address concerns over US missile stock shortages in potential high-intensity conflicts.

It is a vertical-launch, soldier-rucksack-portable “kamikaze” drone intended for frontline use, with a modular payload design that allows it to be configured for precision strike, anti-armor (anti-tank) attacks, electronic warfare, or intelligence, surveillance, and reconnaissance missions. The system is built for flexibility in combat, enabling operators to swap payloads and update components quickly as mission requirements evolve.

In addition to its modularity, the Hellhound S3 emphasizes performance and cost efficiency. It can reach speeds of over 375 mph, allowing it to rapidly engage time-sensitive or hardened targets, including armored vehicles, while reducing reliance on more expensive missile systems. Its 3D-printed construction also enables design changes and upgrades to be implemented in days rather than months or years, making it a highly adaptable option for scaling affordable precision strike and anti-armor capability.

During the Space and Missile Defense Symposium, Cummings also unveiled the Hellhound S4, an upgraded version that is larger, tube-launched, vehicle-mounted, and designed to deliver improved performance over the S3.