Science59 mOctober 13, 2026, 05:35

Anduril develops modular Steelfin interceptor missile

Anduril is building the Steelfin family of interceptor missiles for the US military, using a two-stage design with swappable boosters and a common terminal section to counter drones and ballistic threats more affordably. Flight testing is planned for 2027, with output targeted at several thousand missiles a year.

Interesting Engineering

Open source

Two-stage design with interchangeable solid rocket boosters and a common terminal airframe
Compatible with M903A2, Mk 41 VLS and Typhon launchers, plus AEGIS and IBCS software
Flight testing of Steelfin variants is planned to begin in 2027
Target output is several thousand missiles annually; pricing not disclosed

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