SM-6 Blk I/IA vs Fattah-2: Cost-Exchange Ratio & Combat Analysis
Compare
2026-03-21
3 min read
Overview
This analysis compares the SM-6 Blk I/IA, a US Multi-role BMD/AAW system costing $4.9M per unit, against the Fattah-2, an Iranian Hypersonic RV costing $3.5M per unit. The cost-exchange ratio of 1.4:1 favors the attacker — meaning it costs the defender 1.4x more to intercept than the missile cost Iran to produce. At Operation Epic Fury burn rates of 6/day, the SM-6 Blk I/IA inventory of 750 units faces depletion in approximately 125 days. Multi-mission missile: anti-air warfare, ballistic missile defense, and anti-surface strike Hypersonic glide vehicle warhead on solid-fuel booster, claimed Mach 13+
Side-by-Side Specifications
| Dimension | Sm 6 Blk I Ia | Fattah 2 |
|---|
| Unit Cost |
$4.9M |
$3.5M |
| Cost-Exchange Ratio |
1.4:1 |
1.4:1 |
| Range |
Multi-role BMD/AAW |
1400 km |
| Inventory |
~750 |
~30 |
| Annual Production |
165/yr |
— |
| Role |
Multi-role BMD/AAW |
Hypersonic RV |
| Manufacturer |
RTX/Raytheon |
Iran / IRGC |
| Fuel |
Solid rocket |
— |
Head-to-Head Analysis
Cost-Exchange Economics
The SM-6 Blk I/IA costs $4.9M per unit while the Fattah-2 costs just $3.5M, creating a 1.4:1 cost-exchange ratio. Moderately unfavorable for the defender.
The Fattah-2 has a 1.4:1 cost advantage over the SM-6 Blk I/IA. This asymmetry is a key factor in the conflict's economic sustainability.
Inventory & Depletion
Coalition forces have approximately 750 SM-6 Blk I/IA interceptors with annual production of 165 units. Iran maintains an estimated 30 Fattah-2 units. The SM-6 Blk I/IA is already 17% depleted vs operational requirements. At Operation Epic Fury burn rates of 6/day, the SM-6 Blk I/IA inventory of 750 units faces depletion in approximately 125 days.
Coalition holds an inventory advantage, but at 1.4:1 cost ratio, this is offset by economics.
Tactical Engagement
The SM-6 Blk I/IA engages the Fattah-2 during the flight phase. With 1400km range, the Fattah-2 can be launched from deep within Iranian territory, complicating launch detection. Triple mission. 200+ fired in Red Sea ops. Only dual AAW+BMD.
The SM-6 Blk I/IA is designed to counter threats like the Fattah-2, but sustained engagement at 1.4:1 cost ratios creates long-term sustainability challenges.
Scenario Analysis
Mass salvo of Fattah-2 missiles
In a saturation attack using Fattah-2 systems, the SM-6 Blk I/IA battery would need to engage multiple targets simultaneously. At $4.9M per interceptor, a salvo of 1 Fattah-2 missiles would cost $3.5M to launch but $4.9M to intercept.
Fattah-2
Extended conflict (30+ days)
Over 30 days of sustained combat, the SM-6 Blk I/IA inventory faces significant depletion pressure. Annual production of 165 units translates to just 0.5 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 SM-6 Blk I/IA should be integrated into a layered defense architecture, not relied upon as a standalone solution against Fattah-2 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 SM-6 Blk I/IA interceptors for high-value targets.
Overall Verdict
The SM-6 Blk I/IA vs Fattah-2 matchup produces a 1.4:1 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
Related News & Analysis