ISC open-source assessment title card, 13 June 2026. A licensed image will accompany the published edition.

US Army Awards iRocket up to $150 Million to Scale Hydra-70 Guided-Rocket Production for Counter-Drone Defence

Technical Summary

The United States Army has awarded Innovative Rocket Technologies (iRocket) of New York an indefinite-delivery contract valued between 30 and 150 million US dollars to scale production of guided-rocket components for the 2.75-inch (70mm) Hydra 70 rocket family. The award, made through the Army Program Executive Office (PEO) Fires, supports a counter-unmanned aerial system (C-UAS) interceptor built by adding a semi-active laser (SAL) guidance section to an otherwise unguided folding-fin aerial rocket. The configuration mirrors the fielded Advanced Precision Kill Weapon System (APKWS), which inserts a mid-body guidance unit between the warhead and the Mk 66 rocket motor.

iRocket states that its Factory ONE facility is designed to cast one solid-propellant grain every five minutes, equating to a stated maximum of around 97,000 motors per year under near-continuous operation. The Mk 66 Mod 4 motor uses a reduced-smoke composite propellant based on a hydroxyl-terminated polybutadiene (HTPB) binder with an ammonium perchlorate oxidiser, and a single motor carries on the order of 3 kg of propellant (basis: open-source Mk 66 data; not independently verified for the iRocket configuration). The warhead pairing, fuzing and the precise propellant formulation iRocket will qualify are not disclosed.

The award is valued at up to 150 million US dollars and underwrites a stated production ceiling of roughly 97,000 rocket motors per year, one grain cast about every five minutes. ISC assessment from open-source reporting, June 2026

Analysis of Effects

Against Group 1 to Group 3 unmanned aircraft, a laser-guided 2.75-inch rocket trades the large warhead and high unit cost of a Hellfire-class missile for volume and magazine depth. A typical pairing uses a blast-fragmentation warhead such as the M151 (about 1 kg of high-explosive fill) or a multi-purpose penetrator, relying on fragmentation rather than a direct hit to defeat a small, manoeuvring target. Semi-active laser homing gives a single-digit-metre miss distance at the ranges where rotary- and fixed-wing platforms engage drones, which is enough for a fragmenting warhead to achieve a hard kill.

The strategic value lies less in the projectile than in the production rate. Sustained drone attacks on deployed forces have exposed how quickly precision-interceptor stocks deplete and how poorly the existing missile industrial base scales. A motor line able to cast tens of thousands of grains a year addresses the binding constraint, which is energetic-material throughput rather than airframe assembly. The same logic has driven recent expansion of US propellant capacity at American Ordnance and General Dynamics sites.

Personnel and Safety Considerations

Scaling solid-propellant casting is the dominant explosive-safety consideration. Composite propellant production handles ammonium perchlorate and finely divided aluminium in bulk, processes governed in the United States by the Department of Defense Explosives Safety Regulation DESR 6055.09 and, for NATO above-ground storage, by Allied Ammunition Storage and Transport Publication AASTP-1 (Edition C). Finished Mk 66 motors are typically assigned Hazard Division 1.3 (mass fire), while complete rounds fitted with high-explosive warheads are usually Hazard Division 1.1 (mass detonation). The compatibility group and net explosive quantity (NEQ) per packaging configuration for the iRocket design are not stated and must be established through formal hazard classification before bulk storage or transport.

Data Gaps

Several technical parameters remain unconfirmed: the exact propellant formulation and grain geometry iRocket will qualify; the NEQ, Hazard Division and Compatibility Group of the production configuration; the warhead and fuze types to be paired with the guided rounds; the firm quantity within the 30-to-150 million dollar ceiling; and whether the contract covers complete rounds or motor and guidance sub-assemblies only. The 97,000-unit figure is a stated maximum capacity, not an ordered quantity.

Corrections & updates welcome. If you hold open-source data that refines or corrects any parameter in this article, please contact [email protected] citing the specific claim and your source. Verified corrections will be incorporated and credited in the revision history. AI-assisted technical assessment based on open-source material. Not a formal intelligence product.