X-Bow Selected to Boost Navy Cruise Missile With Claimed 1,150-Mile Range

An affordable cruise missile for US allies is being designed around an ambitious reach that has yet to be demonstrated. Prime contractor CoAspire has selected X-Bow Systems to develop and produce the solid rocket boosters that will launch the US Navy’s ground-based CHAOS missile, which is tied to a claimed potential range of roughly 1,150 miles.

X-Bow announced the selection on October 27 and called it the company’s seventh new propulsion program of 2026. Neither company disclosed the subcontract’s value, the number of boosters covered, or a delivery schedule. CoAspire said in July that the Navy had selected the ground-launched missile through a separate $70 million prototype agreement.

The booster handles the first phase of flight

CHAOS is a cruise missile, but it still needs a short, forceful burst of rocket propulsion to leave a ground launcher and reach the conditions required for sustained flight. X-Bow’s solid rocket motor will provide that initial acceleration. Once its work is complete, the booster will separate and the missile’s own propulsion system is intended to carry it onward.

That makes the booster a distinct launch-stage subsystem rather than the source of the missile’s full advertised range. The range figure comes from CoAspire’s larger Rapidly Adaptable Affordable Cruise Missile-Extended Range design, on which CHAOS is based. CoAspire claims that design could reach as far as 1,000 nautical miles, or about 1,150 statute miles, but that potential has not been demonstrated in the information released so far.

The separation is important for evaluating the program’s progress. Selecting a booster supplier establishes who will develop a necessary piece of the ground-launch architecture; it does not show that the complete missile has flown the claimed distance. Publicly undisclosed details including test milestones, booster quantities and delivery timing also make it difficult to judge how far the propulsion work has advanced toward production.

Affordability must survive the move into production

The Navy’s Precision Strike Weapons program office is developing CHAOS under PMX-201 with affordability, production scale and exportability built into the requirements. The intended mission set includes land targets and moving maritime targets, while the intended customers include US allies seeking a less costly precision-strike option than existing high-end weapons.

For that premise to hold, the design must move beyond claimed performance and become repeatable to manufacture. Solid motors have storage and handling advantages because their propellant is contained within the motor, but a production program still depends on qualified materials, consistent manufacturing, inspection and a supplier base able to deliver at the planned rate. X-Bow’s selection adds another company to a solid-rocket-motor industrial base that major defense contractors are also trying to expand as demand rises.

Exportability creates a separate constraint. Missile-related transfers are subject to national licensing decisions and international nonproliferation policy. The Missile Technology Control Regime guidelines place particular scrutiny on long-range rockets, cruise missiles and major subsystems, although individual governments make export decisions under their own laws. Describing CHAOS as exportable therefore signals a program objective, not automatic approval for every prospective allied customer or configuration.

The Navy is aiming for production by 2028

The Navy said in August that the initial expeditionary ground-launch capability is expected to enter production by 2028. That target gives CoAspire and X-Bow a relatively short path from subsystem development through testing, qualification and manufacturing preparation. Prototype agreements are intended to accelerate that process and draw newer defense companies into competition, but the calendar still has to accommodate the physical work of proving the integrated weapon.

Surface-launched versions could follow, and air-launched configurations remain possible if military requirements call for them. For now, those are potential extensions rather than delivered capabilities. The confirmed configuration is ground-launched, the newly assigned X-Bow role is the launch booster, and the next meaningful proof point will be evidence that the complete system can turn its claimed reach and lower-cost production strategy into demonstrated performance before the Navy’s 2028 production target.

By David Whitaker — Associate editor for AMI’s aerospace and drone systems desk, translating flight systems, aircraft programs, spaceflight, and UAV developments into accessible technical stories.