A Weapon Whose Per-Shot Cost Rounds to Zero

The Army's LOCUST laser, now fielded as a frontline counter-drone weapon, engages a target for a cost the Pentagon puts at under five dollars a shot. In July, the Department of War awarded two more Joint Laser Weapon System contracts, to nLIGHT Defense and Lockheed Martin's Aculight unit, worth an initial $86 million against a program ceiling of $847 million, and Lockheed separately landed a contract to develop a 500 kilowatt laser for cruise missile and drone defense. Every one of these programs is chasing the same number: the cost of stopping a cheap drone with something even cheaper than the drone itself.

A missile interceptor can cost tens or hundreds of thousands of dollars to shoot down a drone worth a few thousand. That math does not survive contact with a swarm. A laser's marginal cost per shot is close to the price of the electricity it consumes, which is why the Pentagon is now funding lasers from multiple vendors simultaneously rather than betting on one program the way it might have a decade ago. The tradeoff is real: a laser needs a clear line of sight and struggles in fog, dust, or heavy weather, which is exactly why it is being fielded as one layer in a broader defense system rather than a standalone replacement for missiles.

From the Battlefield to the Balance Sheet

The economics driving this buildout are almost entirely about magazine depth, not raw destructive power. A laser weapon's real advantage is that it does not run out of ammunition as long as the power source holds, which flips the cost curve in a sustained engagement in a way no missile-based interceptor can match. That is why the Pentagon is funding parallel laser programs from an industrial laser company, nLIGHT, and a traditional prime's specialty subsidiary, Aculight, rather than consolidating around a single winner early. Capital allocators should read this multi-vendor structure as the government hedging on which underlying laser architecture scales fastest, and rewarding whichever supplier gets from a 20 kilowatt demonstrator to a deployable 500 kilowatt system first, since power output and beam quality at scale are the real bottleneck, not any single breakthrough.

The Dual-Use Reality Check

nLIGHT's core business before any of this was industrial fiber lasers, the kind used for cutting and welding metal on commercial manufacturing lines, and its move into defense directed energy is a direct extension of that same underlying photonics manufacturing base rather than a new technology built from scratch. The optics, cooling systems, and beam control engineering that make a defense laser weapon viable are the same disciplines that make an industrial cutting laser more precise and more powerful, and a company that improves one improves its capacity to build the other. Every dollar the Pentagon spends pushing laser power output higher for counter-drone use also pulls forward the industrial laser technology that manufacturers use for cutting, welding, and additive manufacturing, the same additive manufacturing this newsletter has already flagged as a bottleneck-breaker in shipbuilding.

The Capital Signal

The signal is that directed energy has quietly become one of the more capital-efficient categories in the entire counter-drone buildout, because a laser company is not just selling a weapon, it is selling a manufacturing capability with an obvious civilian analog that already has paying customers. That gives laser suppliers a revenue base the Pentagon does not have to fully fund on its own, unlike a pure defense hardware program with no other customer. Watch for the vendor pool here to be judged on watts delivered reliably in the field rather than watts claimed in a lab demonstration, because the entire investment thesis behind directed energy collapses if the beam cannot hold up outside a controlled test environment. An airspace shutdown near El Paso earlier this year, triggered by a laser test, was an early reminder that fielding this technology safely alongside civilian air traffic is its own unsolved problem, and whoever solves it first has a real advantage.

Signal: The cheapest way to beat a five-thousand-dollar drone is a weapon whose per-shot cost rounds to zero, and that is exactly what the Pentagon is now funding at scale.