--- title: "Anduril pitches Steelfin at less than half Lockheed Martin's PAC-3 MSE cost; no variant has flown" description: "Anduril's new interceptor family claims most of a Patriot PAC-3's capability for under half its cost. No variant has been flight-tested and no quantity is contracted, but the Pentagon is already shopping the cheap end of the market, and Lockheed Martin is defending both ends of its own ladder." publisher: "The Inference" section: "Hardware" published: 2026-10-13T13:16:40.544Z modified: 2026-10-13T13:16:40.544Z canonical: https://theinference.org/article/anduril-pitches-steelfin-at-less-than-half-lockheed-martin-s-pac-3-mse-cost-no-variant-has-flown language: en keywords: "Anduril, Lockheed Martin, Missile Defense, Defense Procurement, Pentagon" --- # Anduril pitches Steelfin at less than half Lockheed Martin's PAC-3 MSE cost; no variant has flown > Anduril's new interceptor family claims most of a Patriot PAC-3's capability for under half its cost. No variant has been flight-tested and no quantity is contracted, but the Pentagon is already shopping the cheap end of the market, and Lockheed Martin is defending both ends of its own ladder. [Anduril](https://theinference.org/markets/companies/anduril) unveiled the Steelfin interceptor family at the Association of the U.S. Army's annual convention on October 12, 2026, and [the announcement](https://www.anduril.com/news/steelfin) that matters is a price list [1][2]. Steve Milano, who leads Air Dominance and Strike at Anduril, said a Steelfin variant would fly about 80 percent of the Patriot PAC-3 MSE's mission for less than half that interceptor's cost [1][3]. A larger one, he said, would cover the entire THAAD mission for a fraction of the price, and a naval version more than 80 percent of an SM-2's capability for a third of the cost [1][3]. *Chart: **Anduril claims 80 to 100 percent of each mission at half the price or less** Column chart of Anduril's Steelfin launch claims: mission coverage against price share versus PAC-3 MSE, THAAD and SM-2 Block IIIC.* *Steve Milano's claims at the Steelfin unveiling on October 12, 2026, as reported by The War Zone and Aviacionline: about 80% of the PAC-3 MSE's mission for less than half its cost, the entire THAAD mission for a fraction of the price (no figure given), and more than 80% of an SM-2's capability for a third of the cost. Claims, not test results: no variant has flown. [1][3]* ## Steelfin arrives unproven [Lockheed Martin](https://theinference.org/markets/companies/lockheed-martin) builds both of the Army missiles in those claims: the PAC-3 MSE, or Missile Segment Enhancement, the current Patriot round, and THAAD, the Army's high-altitude shield [4][5]. The threat to Lockheed is not one missile but the manufacturing doctrine behind the claims: a common production line able to attack every product at once. Steelfin arrives unproven. Ballistic tests with representative vehicles are done, but no variant has been flight-tested, the first flights come in 2027, and no quantity is contracted [1][6]. *Chart: **The interceptors Steelfin attacks cost $2.5M to $15.5M a shot** Bar chart comparing per-interceptor unit prices: THAAD about $15.5M, PAC-3 MSE about $5.3M, SM-2 Block IIIC about $2.5M.* *Unit prices as compiled by TWZ from U.S. budget documents, October 12, 2026; PAC-3 MSE per the Army's FY2027 budget request. PAC-3 MSE and THAAD are Lockheed Martin lines. [1]* ## The design is a production line Steelfin is a two-stage missile: a booster that changes with the mission, and a terminal stage that shares one airframe, one set of avionics, one software base and one set of interfaces across every variant [6]. Open interfaces let Anduril buy seekers and other components from competing suppliers, commercial parts included [6][7]. The cost claim lives in the factory: every variant moves through one line with the same tooling and technicians, so output shifts toward whichever missile the fight demands [6]. Anduril plans several thousand interceptors a year at first, full-rate production by the end of 2028 or the start of 2029, and volumes Milano puts "closer to hundreds of thousands" if demand arrives [2][6]. The variants fit launchers and fire control the force already fields, the Patriot M903A2, the Navy's Mk 41, the Army's Typhon, AEGIS and IBCS, so a buyer adds missiles rather than infrastructure [1][6]. ![A Patriot interceptor missile firing from an M903 launching station in a grassy field, flames and smoke billowing around the canister.](https://storage.googleapis.com/theinference-public/img/6c376a330528ad14.jpg) *An M903 Patriot launching station fires a PAC-2 interceptor during Exercise Tenacious Archer 25 in Palau, August 2025. Anduril says Steelfin variants will fit the M903A2 the Army already fields. (U.S. Army photo by Capt. Frank Spatt)* ## The buyer moved first Anduril president Christian Brose told reporters the force is "struggling with a set of legacy interceptors that are not scalable" against drones and missile raids [2]. Procurement agrees with him. In May [the Army asked industry for a Patriot-compatible interceptor under $1 million](https://theinference.org/article/the-army-paid-lockheed-1-2-billion-then-put-its-next-missile-up-for-bid), and the Navy is pursuing its own modular missile family [1]. Anduril is already through one gate, picked after [the Army's xTech Apex Intercept competition](https://breakingdefense.com/2026/10/anduril-unveils-steelfin-interceptor-as-cheaper-option-to-pac-3-missiles/) to advance to testing and demonstrations in that low-cost program [2]. ## Lockheed is defending both ends of its ladder Lockheed has the exposure, and it is already moving. A seven-year PAC-3 agreement announced in January was raised in July by [a modification worth up to $53.86 billion](https://www.twz.com/land/pac-3-edge-will-be-the-most-capable-patriot-interceptor-ever), lifting the multiyear total to $58.62 billion, with the aim of more than tripling annual output [5]. Days before Anduril's launch it unveiled the PAC-3 Edge, a more capable Patriot round for the Army's Future Interceptor program, alongside the PAC-3 ACE, a cheaper interceptor pitched at under half the MSE's price [5][8][9]. The incumbent is segmenting its own market before anyone takes it away. The open difference is the factory: Lockheed's cheaper round will come off the same Camden, Arkansas line as the exquisite one, while Anduril intends to build most Steelfin subassemblies at [Arsenal-1, its plant in Ohio](https://theinference.org/article/an-ohio-school-cut-anduril-s-tax-bill-by-60-million-then-asked-homeowners-for-74-million) [2][5]. ## The missing link is certification Anduril has never fielded a surface-to-air missile, and modular interceptor programs have a long record of compromise [1]. Fitting existing launchers is not the same as being cleared to fire from them; every configuration still has to pass integration and safety testing [3]. Until variants fly in 2027 and a contract names a quantity, the price numbers stay a pitch [1][6]. ## Two decisions for the calendar Anduril is private, valued at $61 billion in May, so the fight has one listed side: Lockheed owns the franchises under attack [10]. Holders can put two decisions on a calendar: the Army's award under [that sub-$1 million solicitation](https://www.twz.com/land/anduril-unveils-steelfin-family-of-modular-surface-to-air-missiles) [1], and Future Interceptor testing in 2027, which Lockheed's Edge enters against one unnamed rival, the same year Steelfin first flies [1][2][5]. Anduril declines to say whether it is that rival [2]. Whoever certifies a cheap missile into launchers the Pentagon already owns will deserve the volume that follows. ## Takeaway Anduril is attacking Lockheed Martin's interceptor franchises with a price list and one shared production line, but no Steelfin variant has flown and no quantity is contracted. ## Sources 1. [TWZ (The War Zone), "Anduril Unveils Steelfin Family Of Modular Surface-To-Air Missiles," 12 October 2026](https://www.twz.com/land/anduril-unveils-steelfin-family-of-modular-surface-to-air-missiles) 2. [Breaking Defense, "Anduril unveils Steelfin interceptor as cheaper option to PAC-3 missiles," 12 October 2026](https://breakingdefense.com/2026/10/anduril-unveils-steelfin-interceptor-as-cheaper-option-to-pac-3-missiles/) 3. [Aviacionline, "Steelfin: Anduril's low-cost modular bid to intercept threats from drones to hypersonic missiles," 12 October 2026](https://www.aviacionline.com/english/defence/united-states/steelfin-anduril-s-low-cost-modular-bid-to-intercept-threats-from-drones-to-hypersonic-missiles_a6accf37be5cd2a0ccba7b6c1) 4. [Lockheed Martin, THAAD product page, accessed 13 October 2026](https://www.lockheedmartin.com/en-us/products/thaad.html) 5. [TWZ (The War Zone), "PAC-3 Edge Will Be The Most Capable Patriot Interceptor Ever," 12 October 2026](https://www.twz.com/land/pac-3-edge-will-be-the-most-capable-patriot-interceptor-ever) 6. [Anduril Industries, "Anduril Unveils the Steelfin Family of Surface-to-Air Interceptor Missiles," 12 October 2026](https://www.anduril.com/news/steelfin) 7. [Pulse 2.0, "Anduril Unveils Steelfin Family Of Surface-To-Air Interceptor Missiles," 13 October 2026](https://pulse2.com/anduril-unveils-steelfin-family-of-surface-to-air-interceptor-missiles/) 8. [Reuters via MSN, "Anduril unveils interceptor missile family Steelfin to counter varied threats," 12 October 2026](https://www.msn.com/en-us/technology/aviation/anduril-unveils-interceptor-missile-family-steelfin-to-counter-varied-threats/ar-AA2e2Vqd) 9. [TWZ (The War Zone), "PAC-3 Adapted Capability Effector Is Lockheed's New Low-Cost Patriot Interceptor," 20 July 2026](https://www.twz.com/land/pac-3-adapted-capability-effector-is-lockheeds-new-low-cost-patriot-interceptor) 10. [Wikipedia, "Anduril Industries," accessed 13 October 2026](https://en.m.wikipedia.org/wiki/Anduril_Industries) --- Anduril pitches Steelfin at less than half Lockheed Martin's PAC-3 MSE cost; no variant has flown — The Inference. Canonical: https://theinference.org/article/anduril-pitches-steelfin-at-less-than-half-lockheed-martin-s-pac-3-mse-cost-no-variant-has-flown