US Army Selects Switchblade 400 for LASSO Anti-Armour Loitering Munition Programme

Switchblade® 400, selected by the US Army under the Low-Altitude Stalking and Strike Ordnance (LASSO) programme, 4 May 2026. (Image: © AeroVironment, Inc. Used for editorial reporting purposes.)

Technical Summary

AeroVironment (AVAV) announced on 4 May 2026 that the United States Army has awarded it a prototype agreement under the Low-Altitude Stalking and Strike Ordnance (LASSO) programme, establishing the Switchblade® 400 as the platform for the Army’s enduring next-generation man-portable loitering munition capability.^[1] The award was made under Other Transaction Authority (OTA), which permits accelerated prototype development outside the standard Federal Acquisition Regulation (FAR) framework.

The Switchblade 400 is a single-use loitering munition (SULM) — effectively a precision-guided munition with an integral surveillance and terminal guidance capability. Deployed via rocket-assisted tube launch and operable by a single soldier in under five minutes, the system integrates directly with tactical networks including ATAK and Nett Warrior.^[2]

System Specification

Single-operator employment: a soldier carries the Switchblade 400 all-up round (18 kg / 39 lb), demonstrating the system’s man-portable profile. The launch tube configuration requires no additional assembly prior to deployment. (Image: © AeroVironment, Inc. Used for editorial reporting purposes.)

Analysis of Effects

The LASSO programme represents the US Army’s formalisation of lessons from the Ukraine conflict, where man-portable loitering munitions — principally the Switchblade 300 and Lancet family — have demonstrated the utility of persistent observation combined with terminal precision against armoured vehicles and light field fortifications. The Switchblade 400 extends the engagement envelope from the Switchblade 300’s approximately 15 km to 65 km, placing it within the range band traditionally associated with tube artillery and some short-range ballistic systems.

Warhead performance data now available from open-source reporting confirms a Javelin-class tandem shaped charge (HEAT) configuration.^[3][5] The Javelin tandem warhead employs a small-diameter precursor charge to initiate explosive reactive armour (ERA), clearing the path for a larger primary HEAT warhead to engage the primary armour plate beneath. If the Switchblade 400 employs an equivalent configuration, it would represent the first man-portable loitering munition at this weight class to offer ERA-defeating capability against front-line Russian and NATO main battle tank (MBT) designs — resolving a persistent limitation of earlier organic anti-armour drone systems.

The Aided Target Recognition (ATR) capability, operating day and night in denied and contested environments, reduces operator cognitive load during time-critical engagements. ATR classification algorithms distinguish between armoured fighting vehicles (AFVs), light armoured vehicles (LAVs), trucks, and other target categories, enabling the operator to confirm or override engagement recommendations rather than conduct full manual identification under time pressure. This human-machine teaming model complies with US DoD Directive 3000.09 (Autonomous Weapon Systems) requirements for “appropriate levels of human judgment over the use of force.”

The Modular Open Systems Approach (MOSA) architecture is a procurement-strategic decision as much as a technical one. By maintaining open interfaces between the seeker, warhead, propulsion, and communications modules, the Army preserves the option to integrate upgraded components — higher-resolution electro-optical/infra-red (EO/IR) seekers, improved warheads, anti-jamming communications — without full system replacement. This directly addresses the rapid obsolescence cycle observed in Ukraine, where electronic warfare (EW) countermeasures have regularly degraded first-generation drone guidance within months of introduction.

Government Contract Register

Three linked US Government contract actions establish the programme baseline for the Switchblade family under which the LASSO OTA sits.

Personnel and Safety Considerations

From a WOME safety perspective, single-use loitering munitions present a category of hazard distinct from conventional munitions storage. Key considerations include:

• Hazard Classification: Likely HD 1.1D (mass explosion hazard) given the confirmed anti-armour warhead. Hazard Division and Compatibility Group for the specific variant remain a DATA GAP pending official classification release.
• Abort and self-destruct mechanisms: Loitering munitions require reliable abort protocols and in-flight self-destruct (IFSD) capability to prevent uncontrolled impact of a live warhead if the engagement is cancelled or the communications link is severed. AeroVironment has not publicly detailed the Switchblade 400’s IFSD arming logic or arm-fire device (AFD) design.
• Dud / unexploded ordnance (UXO) risk: If the terminal dive is aborted at low altitude or the fuze fails to function, the impact of a live anti-armour warhead creates a Category 1 UXO hazard. EOD clearance procedures for dud Switchblade-type munitions should apply low-order initiated disposal techniques given the tandem HEAT geometry and ERA-defeating precursor charge.
• Storage and transport: At 18 kg AUR mass, the system will be transported and stored in accordance with STANAG 2895 air transport requirements and ADR/RID ground transport provisions for HD 1.1D ordnance. The all-in-one tube configuration simplifies packaging compliance compared to separately stored warhead/fuze assemblies.

Data Gaps

Warhead type PARTIALLY RESOLVED — Multiple credible open sources confirm a Javelin-class tandem shaped charge (HEAT) anti-armour multipurpose warhead configuration. Specific penetration performance data and precursor/main charge geometry not publicly confirmed.^[3][5]

Net Explosive Quantity (NEQ) DATA GAP — Not stated in any public source. Estimate not possible without warhead geometry details.

Fuze and IFSD logic DATA GAP — Fuze type, arming/safety/initiation system, and in-flight self-destruct arming logic not publicly available.

ATR performance metrics DATA GAP — Classification accuracy rates against current-generation ERA-equipped targets in contested EW environments not disclosed.

FMS eligibility DATA GAP — Whether LASSO / Switchblade 400 will be offered for Foreign Military Sales (FMS) or direct commercial sale has not been confirmed.

References & Further Reading

1. [1] AeroVironment, Inc. “U.S. Army Selects AV’s Switchblade® 400 for LASSO Program.” Press Release, 4 May 2026. www.avinc.com
2. [2] AeroVironment, Inc. Switchblade® 400 — Product Page (specifications). www.avinc.com/solution/switchblade-400
3. [3] Harper, J. “Army awards deal to AV for new Switchblade 400 kamikaze drone to support LASSO program.” DefenseScoop, 4 May 2026. defensescoop.com
4. [4] “US Army Awards AV Prototype Deal for Switchblade 400 Under LASSO Program.” The Defense Post, 5 May 2026. thedefensepost.com
5. [5] “AeroVironment Switchblade 400 drone joins US Army LASSO program to replace traditional anti-tank missiles.” Army Recognition, 2026. armyrecognition.com
6. [6] Harper, J. “Army, AeroVironment ink nearly $1B contract for Switchblade killer drones.” DefenseScoop, 28 August 2024. defensescoop.com [LUS IDIQ $990M]
7. [7] AeroVironment, Inc. “AV Secures $990M Contract to Supply U.S. Army with Switchblade Loitering Munitions.” Press Release, 28 August 2024. www.avinc.com
8. [8] AeroVironment, Inc. “AV Receives $186 Million U.S. Army Delivery Order for Next-Generation Switchblade Systems.” Press Release, 26 February 2026. www.avinc.com
9. [9] AeroVironment, Inc. Switchblade® 400 press imagery and product gallery. Hero image: LASSO programme press release (4 May 2026). Gallery image: AeroVironment product page. www.avinc.com/solution/switchblade-400 [© AeroVironment, Inc. — used for editorial reporting purposes]

AI-assisted technical assessment based on open-source material. Enhanced: specifications updated from AV product page; warhead data gap partially resolved; government contract register added; DVIDS imagery sourced. Not a formal intelligence product. Open Source / Unclassified.