The Army wants a battalion-sized unit holding a new palletized short-range air defense system by the end of calendar 2029, and it is asking industry for a single drop-in kit that can ride on a light truck or a robot and still knock down drones. Briefing slides from an October industry day, reported by The War Zone on Nov. 10, set First Unit Equipped for M-SHORAD Increment 4 in the first quarter of fiscal 2030, which runs from Oct. 1 to Dec. 31, 2029. The program has $108.1 million in the Army's fiscal 2027 research request, and no award has been announced.

The Army held the Increment 4 industry day on Oct. 27-28, 2026, at the Von Braun Center in Huntsville, Ala., according to a SamSearch summary of the SAM.gov notice. The notice ties the event to Request for Information W31P4Q-26-RFI-0001 and lists Army Contracting Command–Redstone Arsenal, Portfolio Acquisition Executive Fires and Portfolio Management Executive Defensive Fires as the responsible offices. SamSearch notes that the event "does not correlate with any immediate contractual awards."

Why the Increment 4 Fielding Date Has Slipped

The schedule has moved. TWZ reports that the Army previously said it was looking for systems that could be fielded sometime between fiscal 2027 and fiscal 2029. The new slides put Initial Operational Capability in fiscal 2030, with the First Unit Equipped milestone in that year's first quarter.

The Congressional Research Service gives a slightly different picture. Its In Focus report IF12397, updated April 28, 2026, says the Army "plans for a Increment 4 initial operational capability by late FY2029, with the first planned fielding to units at Fort Bragg, NC," according to the EveryCRSReport mirror of the CRS document. The two timelines overlap: fiscal 2030's first quarter falls inside calendar 2029. But the industry day slides label IOC as a fiscal 2030 event rather than a late fiscal 2029 one, which points to a small slip of a quarter or so since the CRS update. Neither source explains the change.

The requirement itself is older than the current schedule. CRS reports that the Army issued an Increment 4 RFI on May 8, 2024, stating that the capability is to focus on delivering "air defense capability to support dismounted maneuver." Responses were due July 16, 2024.

What the SLED Pallet Has to Carry and Defeat

Increment 4 breaks from the earlier increments by dropping a dedicated host vehicle. The Army wants a "vehicle-agnostic" palletized system, which it calls a Self-Loading Equipment Dock, or SLED, that crews can mount on and dismount from light vehicles. The service has named the Joint Light Tactical Vehicle, the Infantry Squad Vehicle and uncrewed ground vehicles as potential hosts, and it does not want designs that need additional trailers. Because the systems are palletized, units could also set them down at forward sites for static point defense.

The threat list runs from small quadcopters up to longer-range one-way-attack drones such as Iran's Shahed 136, singly or in swarms. The system also has to defend against helicopters and fixed-wing aircraft making attack runs on friendly ground units. The briefing calls for a secondary "direct fire capability for ground targets." TWZ notes that the slides do not mention cruise missiles.

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Endurance and mobility requirements are specific. The Army wants Increment 4 systems to "be able to operate for 72 hours independently, and semi-independently with supported force for 3-7 days," according to the briefing as quoted by TWZ. The slides also list "C-130 loadable in normal SLED & vehicle configuration without special equipment; air droppable, sling-load and dismount capable" as key requirements.

On sensors and weapons, the Army is leaving the door open. The briefing asks only for a "reconfigurable multi-effector MEP [mission equipment package] integrating kinetic effects (e.g. missiles, direct-fire guns), and non-kinetic defeat." In 2025, then-Col. Marc Pelini, who has since been promoted to brigadier general and now serves as the Army's top air defense artillery officer, described the goal as a plug-and-play pallet. "When I talk about [a] menu of options, I’m talking about being able to pull off a radar like an X-band radar and put a Ku-band radar on, or pull a Coyote [counter-drone interceptor] pod off and put a Stinger pod on," Pelini said at the Association of the U.S. Army convention, as quoted by TWZ.

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How Increment 4 Fits Alongside the Stryker-Based Sgt. Stout

Increment 1 produced the Sgt. Stout, a Stryker Double V Hull vehicle with a weapons and radar package configured by Leonardo DRS and installed by General Dynamics Land Systems. CRS lists four fielded battalions: 5-4 ADA in Germany, 4-60 ADA at Fort Sill, Okla., 6-56 ADA at Fort Hood, Texas, and 3-4 ADA at Fort Bragg, where two-thirds of the unit is fielded with completion due by the end of fiscal 2026. The Florida and Ohio Army National Guard are scheduled to follow in fiscal 2028 and fiscal 2029.

Increment 2, a 50-kilowatt laser variant, completed a user assessment, after which the Army decided not to procure or field it, CRS reports. Increment 3 covers the Next Generation Short Range Interceptor to replace the Stinger and the XM1223 Multi-Mode Proximity Airburst round for the 30mm cannon.

The fiscal 2027 request shows where Increment 4 sits in the portfolio. CRS reports $712.7 million in procurement for 14 Sgt. Stout systems and $460.9 million in research and development, of which $215.1 million goes to NGSRI, $94.8 million to directed energy enhancements and $108.1 million to Increment 4 for Joint Forcible Entry and Mobile Brigade Combat Team forces.

What It Means for Contractors

Increment 4 has no announced award and an open mission equipment package. That favors companies that can show a working pallet now. TWZ lists L3Harris, Leidos, Leonardo DRS, MDH Strategic Services, Moog, MSI Defense Solutions, SAIC and Sierra Nevada Corp. among firms that have publicly shown relevant designs, including L3Harris' VAMPIRE, MSI's EAGLS and SNC's BRAWLR. TWZ reports that VAMPIRE and BRAWLR have seen combat service in Ukraine.

SamSearch reports that the industry day aimed to engage system integrators and suppliers of sensors, effectors, motion systems, remote weapon stations and command-and-control systems, which opens room for subcontractors and component makers to team with integrators. Bidders should design to the stated C-130, air-drop and 72-hour endurance limits and plan for networking: TWZ reports the Army is transitioning short-range air defense from the Forward Area Air Defense Command and Control network to the Integrated Battle Command System. With a first-unit date roughly three years out, the industry day and the related RFI are the Army's stated channels for gathering market input before any acquisition.

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