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United States Lockheed Martin
AGM-158B JASSM-ER
An extended-range, stealthy air-launched cruise missile fielded by the US Air Force and allies for penetrating strikes against high-value, heavily defended targets. It is carried by the B-1B, B-2, B-52, F-15E and F-16, with the anti-ship LRASM derived from the same airframe.
In service since 2014 · 6 operator countries
Compiled from public sources ·primary reference ↗ ·last verified 2026-07-02
925
km range
0.8
Mach
450
kg warhead
💲 ≈ $1,400,000, Approximate US Air Force unit procurement cost
Procurement snapshot
Availability & export
US ITAR-controlled
Export needs U.S. State Dept (DDTC) approval; end-use & re-transfer restrictions apply.
Channel: Foreign Military Sales (FMS) or Direct Commercial Sale
Fielded & proven
Established · 6 operators
In service since 2014. Status: active.
Lifecycle cost (est.)
Unit cost known; one-shot / small-arms class has no meaningful O&S tail to model.
Interoperability
No standardised NATO calibre / datalink detected in public specs.
Derived guidance from public data, export regime by country of origin, lifecycle from the GAO ~30% acquisition rule. Verify eligibility, pricing and offsets with the manufacturer and your acquisition authority.
Full specifications
Performance
Speed, range, altitude and engagement capability.
| Max speed (Mach) Maximum speed as a multiple of the speed of sound. Mach 2+ is typical for air-superiority fighters. | 0.8 Mach |
|---|---|
| Range Maximum distance: ferry range for aircraft, operational range for vehicles, maximum engagement distance for missiles. Higher means more standoff or persistence. | 925 km |
Firepower
Armament, payload and guidance.
| Warhead Warhead mass. Heavier generally means larger effect radius, at the cost of range. | 450 kg |
|---|---|
| Warhead type Blast-fragmentation, shaped charge (HEAT), penetrator, thermobaric or nuclear-capable. | Penetrator blast-fragmentation |
| Guidance How the weapon finds its target: inertial, GPS/GLONASS, active/semi-active radar, infrared, laser, TV, wire. | GPS/INS, Imaging infrared terminal homing |
Physical
Dimensions, weight and crew.
| Length Overall length including gun/probe where applicable. | 4.27 m |
|---|---|
| Combat weight Fully loaded weight. Lighter eases transport and bridging limits; heavier often means more armor. | 1,043 kg |
Propulsion
Engine, power and fuel.
| Propulsion type Turbofan, turboshaft, diesel, gas turbine, solid-fuel rocket, ramjet… | Turbofan |
|---|
Program
Cost, production scale and operators.
| Unit cost Approximate flyaway/unit cost where public. Defense pricing varies hugely by contract, offsets and configuration. Lower is cheaper. | $1,400,000 |
|---|---|
| Operator countries Number of countries operating the system. More operators means broader support ecosystem. | 6 |
Specifications compiled from public Lockheed Martin and reference sources ↗. Published defense figures are approximations, treat comparisons as directional. Last verified 2026-07-02.
Compare with rivals
See how it stacks up
Head-to-head comparisons
AGM-158B JASSM-ER vs
BrahMos 
Storm Shadow Frequently asked questions
What is the range of the Lockheed Martin AGM-158B JASSM-ER? +
The Lockheed Martin AGM-158B JASSM-ER has a maximum range of 925 km.
How much does the Lockheed Martin AGM-158B JASSM-ER weigh? +
The Lockheed Martin AGM-158B JASSM-ER has a combat weight of 1,043 kg.
What is the Lockheed Martin AGM-158B JASSM-ER used for? +
The Lockheed Martin AGM-158B JASSM-ER is a missile typically used for deep strike.
How many countries operate the Lockheed Martin AGM-158B JASSM-ER? +
The Lockheed Martin AGM-158B JASSM-ER is operated by 6 countries.
How much does the Lockheed Martin AGM-158B JASSM-ER cost? +
The Lockheed Martin AGM-158B JASSM-ER has an approximate unit cost of 1,400,000 USD. Defense pricing varies by contract, offsets and configuration, treat this as directional.
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