Anduril unveils modular Steelfin surface‑to‑air interceptor family

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Anduril announced the Steelfin family of surface‑to‑air interceptor missiles on 12 October 2026, describing each variant as a combination of a first‑stage booster and a common second‑stage terminal interceptor.
The missiles share a single airframe, avionics, software and flight‑control system, allowing different seekers and mission systems to be added without redesign, and are intended to be compatible with existing air‑defence launchers and software; Anduril plans to produce several thousand interceptors annually in the near term, has completed ballistic testing with representative air vehicles, and expects to begin flight testing the variants in 2027.