U.S. Army Selects Five Companies for PrSM Increment 4 Prototypes

Executive Summary

• The U.S. Army awarded five separate Other Transaction Authority agreements on September 29, 2026, to Anduril, Castelion, Lockheed Martin Missiles and Fire Control, Mach Industries and RTX for Precision Strike Missile Increment 4 prototype development.
• The prototypes are required to launch from the M142 HIMARS and engage moving maritime and relocatable land targets at ranges of 1,000 kilometers or greater. The Army has not publicly disclosed individual prototype award values.
• Increment 4 moves PrSM beyond the capabilities of the earlier increments by combining extended reach, mobile-target engagement and an existing mobile launcher architecture, making the program particularly relevant to long-range fires in contested theaters.

U.S. Army Selects Five Companies for PrSM Increment 4

The U.S. Army has selected five defense companies to compete in the next stage of Precision Strike Missile development, opening a multi-vendor prototype competition intended to produce a weapon capable of reaching 1,000 kilometers or more from the M142 High Mobility Artillery Rocket System.

The agreements, awarded September 29 by the Army Portfolio Acquisition Executive for Fires, went to Anduril, Castelion, Lockheed Martin Missiles and Fire Control, Mach Industries and RTX. Each company will develop a PrSM Increment 4 prototype for a program that is intended to engage moving maritime and relocatable land targets at extended ranges.

The selection marks a significant expansion of competition around the Army’s long-range precision fires portfolio. Rather than extending the existing PrSM design through a single-source development path, the Army is using competing prototypes and flight demonstrations to assess different technical approaches before narrowing the field.

Five Companies Enter the PrSM Increment 4 Competition

The five selected companies represent a mixture of established missile manufacturers and newer defense technology entrants.

The Army described the awards as five separate Other Transaction Authority agreements. Unlike a conventional production contract, the OTA mechanism allows the government to conduct prototype work through a competitive development structure intended to move technology through testing and evaluation without immediately committing the program to a single production design.

The Army has not announced individual dollar values for the five agreements. Accordingly, there is no verified basis for assigning a specific prototype development cost to any of the competitors.

PrSM Increment 4 Targets a Different Operating Problem

PrSM Increment 1 is replacing the Army Tactical Missile System and provides a new long-range precision fires capability from existing Army launchers. Army budget documents identify a threshold maximum range requirement of 400 kilometers for the baseline PrSM requirement, while later increments expand the missile’s target set and capabilities.

Increment 2 adds a seeker capability intended to engage moving maritime and relocatable land targets. The Army awarded Lockheed Martin a contract worth up to $1.2 billion on September 21, 2026, for Increment 2 production. That production effort is separate from the new Increment 4 prototype competition.

Increment 4 is designed to address the next range requirement. The Army’s March 2026 industry-day announcement established three central objectives for the effort: a range of 1,000 kilometers or more, compatibility with the M142 HIMARS with potential future launcher expansion, and the ability to neutralize, suppress or destroy moving maritime and relocatable land targets.

This combination is important because the Army is not pursuing range as an isolated metric. The objective is to connect extended-range fires with the ability to engage targets whose location can change after detection.

HIMARS Compatibility Reduces a Major Integration Barrier

The decision to require M142 HIMARS compatibility gives Increment 4 a significant architectural constraint, but also a potential fielding advantage.

HIMARS is already part of the Army’s long-range fires structure, meaning an Increment 4 missile does not require the creation of an entirely new launcher fleet simply to deliver the weapon. The Army has also demonstrated PrSM launches from both HIMARS and the M270A2 Multiple Launch Rocket System during the broader PrSM development program.

The Army’s FY2027 budget documentation states that the PrSM launch pod missile container holds two missiles and that the system is compatible with the M270A2 and M142 launchers.

For Increment 4, the challenge is therefore concentrated heavily in the missile itself and its associated integration, rather than requiring an entirely new ground-launch architecture.

That distinction matters operationally. A longer-range missile is useful only if the force can move, conceal, reload and employ the launcher system under realistic battlefield conditions.

Competition Is Built Around Flight Testing

The Army plans to use a phased competitive process rather than selecting a single design immediately.

During fiscal year 2027, initial prototype development is scheduled to culminate in a competitive fly-off and down-select. During fiscal year 2028, companies demonstrating mature and successful designs will be eligible for follow-on agreements and a final competitive fly-off.

This creates several decision points between prototype development and a future production decision.

The schedule also gives the Army an opportunity to compare competing propulsion, guidance, seeker, flight-control and systems-integration approaches before committing to a final configuration.

The Army has not publicly released enough technical information to determine which company’s design has an advantage in any individual performance category. Claims about comparative range, speed, survivability, seeker performance or production cost should therefore be treated as unverified until supported by government testing or authoritative company disclosures.

Strategic Importance in the Indo-Pacific

The operational logic behind Increment 4 is closely connected to the geography of the Indo-Pacific.

Long distances between potential launch areas and target locations create a requirement for ground-based weapons that can operate from dispersed positions while holding targets at extended distances. The Army has previously identified PrSM Increment 4 as a response to Indo-Pacific Command requirements and contested operating environments.

A HIMARS-compatible missile with a range of 1,000 kilometers or more could expand the geographic area in which Army ground forces can contribute to joint fires.

The moving-target requirement is equally significant. Fixed targets can often be attacked using preplanned coordinates, but maritime forces and relocatable land formations introduce a more demanding sensor-to-shooter problem.

The weapon therefore has to operate as part of a larger kill chain involving detection, identification, targeting, communications, command and control, launch and battle-damage assessment. The missile’s stated range alone does not establish that the complete kill chain will function at that distance.

The Industrial Base Becomes More Competitive

The selection of five companies also changes the industrial dynamics around the PrSM family.

Lockheed Martin already holds major PrSM production responsibilities, including the current Increment 1 and Increment 2 efforts. The Army’s decision to bring Anduril, Castelion, Mach Industries and RTX into the Increment 4 prototype competition creates multiple technical paths for a future missile.

That competition could give the Army more options if one design encounters propulsion, seeker, manufacturing or integration problems.

It also creates a more demanding test for the industrial base. Building a prototype is different from producing large quantities of operational missiles, maintaining them over their service lives and establishing a resilient supply chain.

The Army’s FY2027 budget justification requests substantial PrSM procurement funding and identifies increased production as an ongoing priority. The document also identifies the program as directly aligned with the Army’s Long Range Precision Fires modernization effort.

The transition from competitive prototypes to affordable production will therefore be as important as the initial flight demonstrations.

From ATACMS Replacement to Extended-Range Fires

PrSM was originally positioned as the replacement for ATACMS, but the program is becoming a broader family of capabilities.

The comparison shows why Increment 4 should not be viewed simply as another production version of the existing missile.

The Army is attempting to expand the geographic reach of its ground-launched precision fires while retaining compatibility with an established launcher ecosystem.

What Comes Next

The immediate test for the five competitors will be whether they can translate their proposed designs into flightworthy prototypes that satisfy the Army’s range, launcher and moving-target requirements.

The planned fly-offs will provide the first major opportunity to compare the competing approaches under common government-defined conditions. Until those tests occur, publicly available information does not support declaring a technical leader among the five companies.

For the Army, the larger objective is clear. PrSM Increment 4 is intended to give ground forces a longer-range precision-fire option that can contribute against both land and maritime targets in environments where aircraft and conventional artillery may face increasing access and survivability challenges.

The program also illustrates a broader shift in Army missile acquisition. Instead of treating extended range as a future modification to a single established design, the service is using competition, rapid prototyping and flight testing to explore multiple solutions before making a production commitment.

If the planned development schedule holds, fiscal years 2027 and 2028 should provide the critical evidence needed to determine which technologies can move from prototype competition toward an operationally viable long-range fires capability.