Lockheed Martin MGM-140 ATACMS vs Lockheed Martin AGM-158B JASSM-ER
Lockheed Martin MGM-140 ATACMS and Lockheed Martin AGM-158B JASSM-ER are both missile, compared here on public specifications. The Lockheed Martin AGM-158B JASSM-ER leads on range (925 vs 300 km).
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Full data
Full spec sheet
 Lockheed Martin MGM-140 ATACMS
Wins 1/4 | Lockheed Martin AGM-158B JASSM-ER
Wins 3/4 | |
|---|---|---|
| Performance | ||
| Max speed (Mach) (Mach) | 3 Mach ✓ | 0.8 Mach |
| Range (km) | 300 km | 925 km ✓ |
| Firepower | ||
| Warhead (kg) | 227 kg | 450 kg ✓ |
| Physical | ||
| Length (m) | 3.98 m | 4.27 m |
| Combat weight (kg) | 1,673 kg | 1,043 kg |
| Program | ||
| Unit cost (USD) | $1,500,000 | $1,400,000 ✓ |
| Units built | 4,000 | N/A |
| Operator countries | 6 | 6 |
Frequently asked questions
Which has the longer range? +
The Lockheed Martin AGM-158B JASSM-ER has the longest range at 925 km.
Which is cheaper? +
The Lockheed Martin AGM-158B JASSM-ER has the lower public unit-cost figure at 1,400,000 USD. Treat this as directional, defense pricing varies by contract and configuration.
Which has the higher max speed (mach)? +
The Lockheed Martin MGM-140 ATACMS has the higher max speed (mach) at 3 Mach.
Which has the higher warhead? +
The Lockheed Martin AGM-158B JASSM-ER has the higher warhead at 450 kg.
Which has the higher operator countries? +
The Lockheed Martin MGM-140 ATACMS has the higher operator countries at 6.
Is the Lockheed Martin MGM-140 ATACMS better than the Lockheed Martin AGM-158B JASSM-ER? +
On the public specs we track, the Lockheed Martin AGM-158B JASSM-ER leads on 3 of 5 headline metrics, see the full spec sheet for the metric-by-metric breakdown.
Where does this comparison data come from? +
Every figure in the table is sourced from public manufacturer pages, defense-ministry releases and reference publications, and is verifiable on each system's spec page. WeaponSpecs does not accept vendor placement.
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