Anduril Unveils Modular 'Steelfin' Interceptor Missiles to Replenish US Defense Stockpiles

Defense tech firm Anduril unveiled the Steelfin family of modular surface-to-air interceptor missiles designed to address diverse aerial threats and replenish strained US weapons stockpiles amid ongoing Middle East conflicts. The missiles use a two-stage architecture featuring a configurable first-stage booster for range and performance, paired with a standardized second-stage terminal interceptor that shares common avionics, airframes, and flight controls. This shared architecture allows different interceptor variants to run through the exact same manufacturing infrastructure, making it easier for the company to rapidly boost output without building bespoke assembly lines. Anduril plans to produce several thousand Steelfin variants annually in the short term to meet growing demand for air and missile defense systems, with official flight testing scheduled to begin next year following recently completed ballistic tests.