US Army turns to 3D-printed rocket motors for low-cost cruise missiles

The LCCM is one of the programs under the "Arsenal of Freedom" initiative, which aims to rebuild the United States' defense industrial base. X-Bow, founded in 2016, specializes in additive manufacturing of solid rocket motors and says it has already produced more than 2,100 combat-ready motors.

X-Bow founder and CEO Jason Hundley framed the deal in terms of volume of fire. "Modern conflict is decided by how many rounds you can put downrange, not how exquisite each one is," he said, adding that the Leidos collaboration would allow the company to "turn out combat-ready rocket motors at production scale, fast."

The company argues that 3D printing is better suited than conventional manufacturing for the complex geometries some solid rocket motors require, and it allows far faster design iteration. New designs can be created and built in days, compared with the months or years traditional defense contractors need to prototype and test motors.

X-Bow is one of several companies applying additive manufacturing to defense. Chromatic 3D Materials has completed a successful static-fire test of a 3D-printed rocket propellant, and Indian startup Othisis demonstrated a 3D-printed cryogenic rocket engine in August. Another startup holds a $30 million contract to prototype 3D-printed jet engines for the US Air Force for use in drones and long-range weapons. The US Navy has also begun 3D-printing drones and parts aboard aircraft carriers, and some US Army units have deployed drones assembled in-house with 3D-printed munitions.

Analysis

Why This Matters

The LCCM program is part of a US effort to rebuild its defense industrial base and field large numbers of low-cost munitions, a strategy shaped by recent conflicts in which volume of fire has proven decisive.
Success would move 3D-printed rocket motors beyond prototyping into production, potentially shortening development cycles from years to days.
The deal could open a missile supply chain long dominated by a few large contractors to smaller, non-traditional manufacturers.

Background

Solid rocket motors have traditionally been built by a small group of established defense contractors using conventional manufacturing, a process that is slow to prototype and expensive to scale. Additive manufacturing appeals to the military because it can handle complex geometries, reduce tooling costs and enable rapid design changes. X-Bow, founded in 2016, is among a wave of startups betting that 3D printing can transform munitions production. The LCCM project, as its name suggests, is designed around a low-cost weapon that can be stored and launched from a container, and fielded in large numbers.

Key Perspectives

The US Army: Wants low-cost munitions in large numbers and is using the "Arsenal of Freedom" initiative to rebuild industrial capacity and shorten supply chains. X-Bow Systems: Argues that volume, not individual sophistication, decides modern conflict, and that additive manufacturing lets it move from design to production in days. Leidos: As the prime contractor, brings systems integration and program management experience to take the booster design into production. Skeptics: 3D-printed rocket motors still need to prove long-term reliability at scale, and the Pentagon's procurement culture may be slow to trust a fast-moving, non-traditional supplier.

What to Watch

Whether LCCM prototypes meet Army test milestones and move into full-rate production.
The size of follow-on contracts as the program scales beyond the development phase.
Adoption by other services: the Air Force's $30 million program for 3D-printed jet engines is an early signal of how far the military takes the technology.

Analysis

Why This Matters

Background

Key Perspectives

What to Watch

Sources