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AGM-158B JASSM-ER Missile

AGM-158B JASSM-ER Missile

Manufacturer: Lockheed Martin
Category: Missiles & Precision Weapons
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Guidance System GPS/INS with Imaging Infrared Seeker
Maximum Speed Subsonic
Launch Compatibility Fighter & Bomber Aircraft
Warhead Technology Penetrating Blast-Fragmentation

Full Specifications

1. General Information

Name / Designation	AGM-158B JASSM-ER
Type / Role	Long-Range Stealth Cruise Missile
Country of Origin	United States
Manufacturer	Lockheed Martin
Service Entry / Year Introduced	2014–2016
Operational Status	Active

2. Performance & Range

Range	900+ km (Extended Range)
Speed	Subsonic
Ceiling / Altitude Limit	Low-altitude terrain-following
Accuracy (CEP)	Within a few meters
Warhead Type	Penetrating blast-fragmentation

3. Guidance & Targeting

Guidance System	GPS / INS + IIR
Targeting Mode	Fire-and-Forget
Launch Platform Compatibility	Fighters, Bombers
Seeker Type	Imaging Infrared (IIR)

4. Physical Characteristics

Length	~4.3 m
Diameter	~0.55 m
Wingspan	~2.7 m
Launch Weight	~1,100 kg
Propulsion	Turbojet

5. Warhead & Payload

Warhead Weight	~450 kg
Explosive Type	Penetrator
Detonation Mechanism	Impact / Delay Fuse
Payload Options	Conventional

6. Operational Use & Capabilities

Operational Range Type	Long
Deployment Platform	Air-Launched
Target Types	Hardened Sites, Infrastructure, C2 Nodes
Combat Proven	Yes
Users / Operators	United States

Our Rating

The overall rating is based on review by our experts

Technology 9 / 10
Performance 9 / 10
Maintenance Efficiency 7 / 10
Range & Endurance 7 / 10

PROS

Extended standoff range for deep-strike operations
Low-observable design enhances survivability
Precise IIR seeker for high-accuracy terminal guidance
Compatible with multiple U.S. combat aircraft
Penetrating warhead effective against hardened targets

CONS

High procurement cost
Limited availability due to high demand
Complex integration for older aircraft
Subsonic speed may reduce survivability in dense threats
Heavily dependent on GPS for mid-course guidance

JASSM-ER Advanced Long-Range Stealth Cruise Missile

The AGM-158B JASSM-ER (Joint Air-to-Surface Standoff Missile–Extended Range) is one of the U.S. Air Force’s premier long-range precision-strike weapons, designed to engage heavily defended, high-value targets from well outside enemy air-defense envelopes. Manufactured by Lockheed Martin, the JASSM-ER represents a major evolution of the original JASSM program, offering significantly greater range and advanced survivability features tailored for modern contested environments.

Introduced into operational service in the mid-2010s, the JASSM-ER builds upon proven low-observable aerodynamics, utilizing a refined airframe, upgraded internal fuel capacity, and enhanced propulsion to achieve ranges exceeding 500 miles (over 900 km). This extended reach enables U.S. strike aircraft—including the B-1B, B-52H, F-15E, F-16C/D, and F-35—to conduct deep-strike missions with minimal exposure to enemy radar or interception.

Powered by a Williams turbojet engine, the missile flies at low altitudes using a combination of GPS/INS navigation and an advanced Imaging Infrared (IIR) seeker for terminal guidance. Its 1,000 lb penetrating warhead, optimized for hardened structures, allows it to neutralize bunkers, command posts, air-defense nodes, and other strategic assets with high accuracy.

The missile’s blend of stealth shaping, autonomous targeting, and fire-and-forget capability makes it a critical asset for U.S. long-range strike doctrine and standoff operations. Its operational success and reliability have led to expanded procurement, continued upgrades, and integration plans with additional next-generation aircraft.

JASSM-ER Cruise Missile Price

The JASSM-ER cruise missile is generally estimated to cost between $1.2 million and $1.5 million per unit, depending on production lot and configuration. Actual pricing varies according to contract quantities and integration requirements for specific aircraft platforms.

Reviews

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