Within Shot Cost
Where Lasers Fit in a Layered Drone Defence
The strongest role for lasers is often not replacing missiles but taking lower-end drones out of the queue before they consume scarce interceptors.
On this page
- Sorting cheap drones from harder targets
- How lasers preserve missile inventory
- Why guns, electronic warfare and missiles still remain
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Introduction
The most persuasive case for military lasers is not that they replace missiles. It is that they help air-defence networks decide which threats deserve a missile in the first place. In a layered defence system, lasers can engage the cheapest and most numerous aerial targets—especially small drones—before those targets consume scarce interceptor stocks. The result is not a missile-free battlefield but a more sustainable one, where expensive missiles are reserved for threats that genuinely require them. Recent conflicts have highlighted how low-cost drones can strain even sophisticated air-defence systems, forcing defenders to spend disproportionate resources on interception. Lasers offer a potential way to rebalance that equation by becoming an additional layer in the defensive stack rather than a substitute for existing layers. [RAND Corporation+2CSIS]rand.orgIf the technology can be matured,RAND CorporationDirected Energy: The Focus on Laser Weapons IntensifiesJanuary 25, 2024 — 25 Jan 2024 — Directed energy weapons offer a m…
Sorting Cheap Drones from Harder Targets
Modern air defence works through layers. Long-range interceptors, medium-range systems, short-range weapons, guns, electronic warfare and close-in defences each address different parts of the threat spectrum. No single system is expected to defeat everything.
The challenge created by inexpensive drones is that they can occupy the same defensive network as much more dangerous threats. A radar may detect dozens of incoming objects, but not all targets justify the same response. A one-way attack drone travelling relatively slowly presents a different problem from a cruise missile, ballistic missile or combat aircraft.
This is where lasers fit most naturally. Rather than replacing missiles, they can remove low-end targets from the engagement queue. A laser that destroys a drone at relatively short range prevents commanders from having to decide whether to expend a missile costing hundreds of thousands or millions of pounds against a target worth a tiny fraction of that amount. RAND has argued that directed-energy systems can become a new defensive layer that relieves pressure on conventional weapons and munitions production, particularly in environments saturated by drones. [RAND Corporation]rand.orgIf the technology can be matured,RAND CorporationDirected Energy: The Focus on Laser Weapons IntensifiesJanuary 25, 2024 — 25 Jan 2024 — Directed energy weapons offer a m…
The logic resembles triage. Air-defence commanders want the most expensive and limited interceptors available when genuinely difficult threats appear. If a laser can eliminate routine drone targets, missile batteries remain available for cruise missiles, ballistic missiles, fast aircraft or threats operating beyond laser range. This sorting function is arguably more important than the laser’s individual performance characteristics.
Ukraine’s experience with large-scale drone attacks demonstrates why defenders increasingly think in terms of layered capacity rather than individual weapon effectiveness. Drone saturation attacks aim not only to inflict damage but also to consume defensive resources and create openings for more capable weapons. [CSIS]csis.orgDrone Saturation: Russia's Shahed CampaignDrone Saturation: Russia's Shahed CampaignMay 13, 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrai…
How Lasers Preserve Missile Inventory
The strongest governance and force-planning argument for lasers concerns inventory management rather than tactical spectacle.
Missiles are not merely expensive; they are finite. They require production capacity, supply chains, transport, maintenance and replenishment. Recent conflicts in Ukraine and the Red Sea have intensified concerns about interceptor consumption rates and the ability of defence industries to replace stocks quickly enough. Analysts increasingly describe missile inventories as strategic resources rather than simply weapons. [CSIS]csis.orgdepleting missile defense interceptor inventoryThe Depleting Missile Defense Interceptor InventoryDec 5, 2025 — Similarly, the Navy has learned a great deal from its engagements in…
A laser changes the economics of repeated engagements. Once deployed and supplied with power, it can theoretically engage multiple suitable targets without consuming a physical interceptor. DragonFire, the British laser weapon programme, has repeatedly highlighted a firing cost measured in pounds rather than the hundreds of thousands typically associated with missile engagements. British defence officials and the Royal Navy have explicitly presented the system as a means of countering drones and similar threats at very low marginal cost. [Royal Navy+2GOV.UK]royalnavy.mod.ukRoyal NavyLaser downs drones in successful trial of possible future…19 Jan 2024 — A burst of a high-intensity beam from Dragonfire cos…
The key point is not that every drone should be engaged with a laser. Rather, each successful laser engagement potentially preserves a missile for later use. In a prolonged campaign, preserving inventory may matter as much as achieving individual interceptions.
Recent strategic discussions increasingly focus on “salvo competition”—the contest between the number of incoming threats and the number of available defensive shots. Analysts at CSIS have argued that drone saturation campaigns seek to overwhelm defensive capacity. Under that logic, a laser becomes valuable because it increases the number of engagements a defender can conduct before exhausting missile magazines. [CSIS]csis.orgnew salvo warThe New Salvo War31-Jul-2025 — One path forward is the rapid deployment of low-cost, high-energy laser systems capable of interceptin…
This inventory-preservation role also explains why many defence organisations describe lasers as complementary systems. The value lies not only in the targets destroyed but in the missiles that do not have to be fired.
Why Guns, Electronic Warfare and Missiles Still Remain
The idea of lasers as a queue-management layer only works because other layers continue to exist.
Laser weapons have important limitations. They generally require line of sight, can be affected by atmospheric conditions, need sustained target tracking and depend on sufficient electrical power and thermal management. A laser that performs well against a small drone may not be the preferred answer to every target type. [GOV.UK]GOV.UKadvanced future military laser achieves uk first19 Jan 2024 — The DragonFire laser directed energy weapon (LDEW) system achieved the UK's first high-power firing of a laser weapon again…
Electronic warfare remains attractive because many drones depend on navigation signals, communications links or onboard electronics that can be disrupted. When jamming works, it may be even cheaper than a laser engagement. However, electronic warfare is not universally effective, particularly against autonomous systems or drones designed to resist interference. [Missile Defense Advocacy Alliance]missiledefenseadvocacy.orgMissile Defense Advocacy Alliance U.SCounter-UAS SystemsTraditional air and missile defense systems, such as the Patriot missile system, are ill-suited and cost ineffective f…
Guns also retain an important place in layered defence. Close-in weapon systems provide a final protective layer and can engage targets under conditions where other options are unavailable. Yet guns bring their own trade-offs involving range, ammunition consumption and engagement geometry. CSIS notes that cheaper intercept methods often involve accepting greater operational risk by allowing threats to approach more closely before engagement. [CSIS]csis.orgCost and Value in Air and Missile Defense InterceptsFeb 13, 2024 — The 20-millimeter (mm) rounds fired by the CIWS were likely cheape…
Missiles therefore remain indispensable. They provide reach, all-weather capability, altitude coverage and performance against targets that lasers cannot reliably defeat. The broader lesson from recent conflicts is not that missiles are obsolete but that relying on them as the primary answer to mass drone attacks creates sustainability problems. Analysts examining drone warfare repeatedly emphasise the need for lower-cost layers that preserve high-end interceptors for high-end threats. [CSIS+2Modern War Institute]csis.orgunpacking irans drone campaign gulf early lessons future drone warfareUnpacking Iran's Drone Campaign in the GulfMar 10, 2026 — Interceptor drones have become a core layer of air defense because they are…
The Real Value of a Laser Layer
The practical contribution of lasers is often misunderstood because discussion tends to focus on dramatic demonstrations of targets being destroyed by beams of light.
Their more significant contribution may be administrative rather than cinematic. A layered defence network must continuously allocate finite resources against a mix of threats. Lasers offer a way to absorb part of the low-end drone burden without consuming physical interceptors. That function becomes increasingly valuable as cheap drones are fielded in larger numbers and used specifically to exhaust defensive inventories. [CSIS+2Phenomenal World]csis.orgDrone Saturation: Russia's Shahed CampaignDrone Saturation: Russia's Shahed CampaignMay 13, 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrai…
Viewed through this lens, lasers are not competing directly with missiles. They are competing for a place in the engagement sequence. If they can reliably remove suitable drones before missile batteries are forced to respond, they strengthen the entire air-defence architecture. Their role is therefore best understood as a queue-management and inventory-preservation layer within a broader defensive system rather than as a standalone replacement for conventional air defence. [RAND Corporation+2Defence Science Review]rand.orgIf the technology can be matured,RAND CorporationDirected Energy: The Focus on Laser Weapons IntensifiesJanuary 25, 2024 — 25 Jan 2024 — Directed energy weapons offer a m…
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Endnotes
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Title: If the technology can be matured,
Link: https://www.rand.org/pubs/commentary/2024/01/directed-energy-the-focus-on-laser-weapons-intensifies.htmlSource snippet
RAND CorporationDirected Energy: The Focus on Laser Weapons IntensifiesJanuary 25, 2024 — 25 Jan 2024 — Directed energy weapons offer a m...
Published: January 25, 2024
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Source: csis.org
Title: Drone Saturation: Russia’s Shahed Campaign
Link: https://www.csis.org/analysis/drone-saturation-russias-shahed-campaignSource snippet
Drone Saturation: Russia's Shahed CampaignMay 13, 2025 — Russia's drone campaign utilizes inexpensive Shahed drones to saturate Ukrai...
Published: May 13, 2025
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Title: new salvo war
Link: https://www.csis.org/analysis/new-salvo-warSource snippet
The New Salvo War31-Jul-2025 — One path forward is the rapid [deployment]({{ 'deployment/' | relative_url }}) of low-cost, high-energy laser systems capable of interceptin...
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Calculating the Cost-Effectiveness of Russia's Drone Strikes19 Feb 2025 — As seen in the table below, precision bombardment with Shah...
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Title: depleting missile defense interceptor inventory
Link: https://www.csis.org/analysis/depleting-missile-defense-interceptor-inventorySource snippet
The Depleting Missile Defense Interceptor InventoryDec 5, 2025 — Similarly, the Navy has learned a great deal from its engagements in...
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Title: advanced future military laser achieves uk first
Link: https://www.gov.uk/government/news/advanced-future-military-laser-achieves-uk-firstSource snippet
19 Jan 2024 — The DragonFire laser directed energy weapon (LDEW) system achieved the UK's first high-power firing of a laser weapon again...
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Source: csis.org
Link: https://www.csis.org/analysis/cost-and-value-air-and-missile-defense-interceptsSource snippet
Cost and Value in Air and Missile Defense InterceptsFeb 13, 2024 — The 20-millimeter (mm) rounds fired by the CIWS were likely cheape...
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Title: unpacking irans drone campaign gulf early lessons future drone warfare
Link: https://www.csis.org/analysis/unpacking-irans-drone-campaign-gulf-early-lessons-future-drone-warfareSource snippet
Unpacking Iran's Drone Campaign in the GulfMar 10, 2026 — Interceptor drones have become a core layer of air defense because they are...
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Center for Strategic and International StudiesThe Center for Strategic and International Studies (CSIS) is a bipartisan, nonprofit...
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Title: Missile Defense Advocacy Alliance U.S
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1, laser-based directed energy weapons are integrated within a layered air- defence architecture alongside kinetic...Read more...
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Published: May 2026
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Title: Phenomenal World Drones Like Bicycles
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expensive interceptor missiles to repel drone attacks.... The real costs of Iranian drones could be dramatically cheaper than assumed—th...
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for Armed Forces as new laser weapon takes down...20 Nov 2025 — Britain's ground-breaking DragonFire laser has shot down high-speed dron...
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mod.uk£316m deal for Royal Navy's first laser weapon after...20 Nov 2025 — More than £300m is being invested in the Royal Navy's first e...
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Additional References
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Initially developed by Iran and used by its militant proxies, the drones gained global relevance when Russia employed them in its war aga...
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UK confirms drone-killing DragonFire laser weapon for...2 days ago — UK confirms drone-killing DragonFire laser weapon for Royal Navy de...
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Link: https://papers.ssrn.com/sol3/Delivery.cfm/6375919.pdf?abstractid=6375919&mirid=1Source snippet
quantitative analysis of low-cost drone warfareKey findings reveal profound cost-exchange ratios that favor drone operators: Patriot-vers...
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Directed-Energy Weapons Transition to Mass Deployment12 May 2026 — It won't take long for others to figure out to give their drones and m...
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UK confirms drone-killing DragonFire laser weapon for...Bill Gates and some ex-Microsoft engineers built a laser system that tracks and...
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This initiative is part of Britain's efforts to enhance its naval defenses, particularly against drone threats. The DragonFire system is...
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Ministry of Defence: RAF Regiment Downs Iranian Drones as UK Typhoon, F-35 Jets, Voyager, and Naval Helicopters Sustain Regional Defense...
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