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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 Stronger than 17% of missiles
- Range
Maximum distance: ferry range for aircraft, operational range for vehicles, maximum engagement distance for missiles. Higher means more standoff or persistence.
- 925 km Stronger than 78% of missiles
Firepower
Armament, payload and guidance.
- Warhead
Warhead mass. Heavier generally means larger effect radius, at the cost of range.
- 450 kg Stronger than 72% of missiles
- 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 Stronger than 50% of missiles
- Operator countries
Number of countries operating the system. More operators means broader support ecosystem.
- 6 Stronger than 59% of missiles
Specifications compiled from public Lockheed Martin and reference sources ↗. Published defense figures are approximations — treat comparisons as directional. Last verified 2026-07-02.
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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.
