Arrow 3 vs Khorramshahr-4: Cost-Exchange Ratio & Combat Analysis
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2026-03-21
3 min read
Overview
This analysis compares the Arrow 3, a Israel Exo-atmo BMD system costing $3.0M per unit, against the Khorramshahr-4, an Iranian Heavy MRBM costing $2.5M per unit. The cost-exchange ratio of 1.2:1 favors the attacker — meaning it costs the defender 1.2x more to intercept than the missile cost Iran to produce. At Operation Epic Fury burn rates of 4/day, the Arrow 3 inventory of 65 units faces depletion in approximately 16 days. Exo-atmospheric interceptor — Israel's upper-tier BMD against long-range ballistic missiles Iran's heaviest MRBM — liquid-fueled, 3,000km range, 1,500kg warhead
Side-by-Side Specifications
| Dimension | Arrow 3 | Khorramshahr 4 |
|---|
| Unit Cost |
$3.0M |
$2.5M |
| Cost-Exchange Ratio |
1.2:1 |
1.2:1 |
| Range |
Exo-atmo BMD |
3000 km |
| Inventory |
~65 |
~50 |
| Annual Production |
30/yr |
— |
| Role |
Exo-atmo BMD |
Heavy MRBM |
| Manufacturer |
IAI + Boeing |
Iran / IRGC |
| Fuel |
Solid rocket |
— |
Head-to-Head Analysis
Cost-Exchange Economics
The Arrow 3 costs $3.0M per unit while the Khorramshahr-4 costs just $2.5M, creating a 1.2:1 cost-exchange ratio. Moderately unfavorable for the defender.
The Khorramshahr-4 has a 1.2:1 cost advantage over the Arrow 3. This asymmetry is a key factor in the conflict's economic sustainability.
Inventory & Depletion
Coalition forces have approximately 65 Arrow 3 interceptors with annual production of 30 units. Iran maintains an estimated 50 Khorramshahr-4 units. At Operation Epic Fury burn rates of 4/day, the Arrow 3 inventory of 65 units faces depletion in approximately 16 days.
Coalition holds an inventory advantage, but at 1.2:1 cost ratio, this is offset by economics.
Tactical Engagement
The Arrow 3 engages the Khorramshahr-4 during the midcourse phase. With 3000km range, the Khorramshahr-4 can be launched from deep within Iranian territory, complicating launch detection. "Running low" WSJ Jun '25. Tripled prod. $6.5B Germany deal.
The Arrow 3 is designed to counter threats like the Khorramshahr-4, but sustained engagement at 1.2:1 cost ratios creates long-term sustainability challenges.
Scenario Analysis
Mass salvo of Khorramshahr-4 missiles
In a saturation attack using Khorramshahr-4 systems, the Arrow 3 battery would need to engage multiple targets simultaneously. At $3.0M per interceptor, a salvo of 1 Khorramshahr-4 missiles would cost $2.5M to launch but $3.0M to intercept.
Khorramshahr-4
Extended conflict (30+ days)
Over 30 days of sustained combat, the Arrow 3 inventory faces significant depletion pressure. Annual production of 30 units translates to just 0.1 per day — far below consumption rates during active operations. Meanwhile, Iran produces approximately 3.3 ballistic missiles and 6.7 drones per day.
Attacker (Iran) — production outpaces defender replenishment
Complementary Use
The Arrow 3 should be integrated into a layered defense architecture, not relied upon as a standalone solution against Khorramshahr-4 threats. Cost-effective lower-tier systems (Iron Dome at $80K, or Iron Beam laser at $2/shot) should handle cheaper threats when possible, preserving expensive Arrow 3 interceptors for high-value targets.
Overall Verdict
The Arrow 3 vs Khorramshahr-4 matchup produces a 1.2:1 cost-exchange ratio favoring the attacker. For sustained conflict planning, interceptor production ramp-up and cost-reduction programs are critical to maintaining defensive capability.
Frequently Asked Questions
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