Munitions

GBU-31(V)3/B Joint Direct Attack Munition

Also known as
  • GBU-31(V)3/B
  • GBU-31 V3 JDAM
  • GBU-31V3
  • GBU-31 BLU-109 JDAM
  • GBU-31 BLU-109/B JDAM
  • KMU-557
  • KMU-557/B
  • BLU-109 JDAM

The GBU-31(V)3/B is the hard-target penetrator variant of the 2,000-pound Joint Direct Attack Munition, pairing a Boeing JDAM GPS/INS tail kit with the BLU-109 penetrator bomb body. Official U.S. sources describe its GPS/INS guidance, 2,115-pound launch-weight configuration, and 15-mile range class, while open-source munition and aviation reporting connect the BLU-109 GBU-31 JDAM lane to Israeli operations during the 2025 Israel-Iran Conflict.

GBU-31(V)3/B Joint Direct Attack Munition, 2,000-pound GPS/INS-guided hard-target penetrator bomb, Munitions
Image source: 366th MUNS GBU-31 Version 3 Bomb Build

Role in Conflicts

2025 Israel-Iran Conflict
Long-Range Strike
Side
Israel

During the 2025 Israel-Iran Conflict, OSMP cataloged Israeli Air Force imagery of a BLU-109 and GBU-31 JDAM on June 13, 2025, and The Aviationist later reported an IAF F-15D Baz carrying a GBU-31(V)3/B-series JDAM during the February 2026 Israel-U.S. strike wave against Iran.

Role details
Profile / Specs

Profile

Origin
United States
Built by
Boeing
Type
2,000-pound GPS/INS-guided hard-target penetrator bomb
Service note
Late 1990s-present
Designer
Boeing
Designed
JDAM development began in 1992
Unit cost
About $22,000 per JDAM tail kit in fiscal 2007 dollars, excluding the bomb body
Produced
Late 1990s-present JDAM family production

Specifications

Guidance
GPS-aided inertial navigation system with tail-control kit
Warhead
2,000-pound BLU-109 hard-target penetrator
Tail kit
KMU-557-series JDAM tail kit for the BLU-109 GBU-31 configuration
Launch platform class
Fighter and bomber aircraft
Accuracy
Less than 6 meters in the most accurate GPS-aided mode according to the U.S. Navy JDAM fact file
Standoff range
About 15 miles in U.S. Air Force JDAM background material
Payload family
GBU-31 2,000-pound JDAM series
Configuration distinction
GBU-31(V)3/B is the BLU-109 penetrator configuration rather than the Mk 84 general-purpose GBU-31 lane
Variants

GBU-31(V)3/B is the BLU-109 penetrator lane inside the 2,000-pound GBU-31 JDAM family, distinct from the Mk 84 general-purpose GBU-31(V)1/B lane.

VariantConfigurationDesignation notes
GBU-31 JDAM (Mk 84 / BLU-109), 2,000-pound GPS/INS-guided bomb configuration, MunitionsGBU-31 JDAM (Mk 84 / BLU-109)2,000-pound JDAM family record

The broader GBU-31 family record covers both the Mk 84 and BLU-109 bomb-body lanes; this entry narrows the BLU-109 penetrator configuration.

Sources: Air Force JDAM Fact Sheet, Navy JDAM Fact File, Federal Register JDAM Tail Kit Notice

GBU-31(V)1 Joint Direct Attack Munition, 2,000-pound JDAM bomb, MunitionsGBU-31(V)1/BMk 84 general-purpose bomb-body configuration

Federal Register source language distinguishes KMU-556 for the Mk 84 GBU-31 lane from KMU-557 for the BLU-109 GBU-31 lane.

Sources: Federal Register JDAM Tail Kit Notice

Bomb Body Configuration

The V3/B designation identifies the BLU-109 hard-target body inside the 2,000-pound JDAM family.

Compatible itemItem typeCompatibility evidence
BLU-109 penetrator warhead, 2,000-pound hard-target penetrator warhead, MunitionsBLU-109 penetrator warhead2,000-pound hard-target penetrator body

U.S. Air Force, Navy, and Federal Register sources identify BLU-109 as the hard-target penetrator body used in the GBU-31(V)3/B or KMU-557 GBU-31 configuration.

Sources: Air Force JDAM Fact Sheet, Navy JDAM Fact File, Federal Register JDAM Tail Kit Notice

Carrier Aircraft

Public sources document both general F-15-family carriage for BLU-109 GBU-31 configurations and an Israeli Baz conflict image-identification case.

CarrierCarrier typeCarriage evidence
F-15 family fighter aircraft, Fighter aircraft family, Aircraft & UAVsF-15 family fighter aircraftMultirole fighter family

Boeing's Advanced F-15 weapons inventory lists the GBU-31 Mk 84 and BLU-109 JDAM configurations in the F-15 external carriage matrix.

Sources: Advanced F-15 Weapons Inventory

F-15 Baz, Multirole fighter, Aircraft & UAVsF-15 BazIsraeli F-15A/B/C/D fighter

The Aviationist reported open-source identification of an IAF F-15D Baz carrying a GBU-31(V)3/B series JDAM with a BLU-109 penetrator warhead during the February 2026 Israel-U.S. strike wave against Iran.

Sources: The Aviationist Israel and U.S. Attack Iran Update

Media

GBU-31(V)3/B Joint Direct Attack Munition Videos

GBU-31(V)3/B Joint Direct Attack Munition Images

GBU-31(V)3/B Joint Direct Attack Munition, 2,000-pound GPS/INS-guided hard-target penetrator bomb, Munitions - view 1
Source: 366th MUNS GBU-31 Version 3 Bomb Build
GBU-31(V)3/B Joint Direct Attack Munition, 2,000-pound GPS/INS-guided hard-target penetrator bomb, Munitions - view 2
Source: 366th MUNS GBU-31 Version 3 Bomb Build
GBU-31(V)3/B Joint Direct Attack Munition, 2,000-pound GPS/INS-guided hard-target penetrator bomb, Munitions - view 3
Source: 366th MUNS GBU-31 Version 3 Bomb Build
Related Weapon Systems
GBU-31(V)1 Joint Direct Attack Munition, 2,000-pound JDAM bomb, MunitionsMunitionsGBU-31(V)1 Joint Direct Attack Munition2,000-pound JDAM bombThe GBU-31(V)1/B Joint Direct Attack Munition is the Mk 84 general-purpose lane of the 2,000-pound JDAM family, combining Boeing's GPS/INS tail-control kit with a 2,000-pound-class bomb body. Official Air Force, Navy, Boeing, and security-assistance sources separate this KMU-556/Mk 84 configuration from BLU-109 penetrator GBU-31 variants, while direct records document exact or Mk 84-specific GBU-31 use in the 2011 Libya air campaign and the 2025 Israel-Iran Conflict.
GBU-31 JDAM (Mk 84 / BLU-109), 2,000-pound GPS/INS-guided bomb configuration, MunitionsMunitionsGBU-31 JDAM (Mk 84 / BLU-109)2,000-pound GPS/INS-guided bomb configurationThe GBU-31 JDAM is the 2,000-pound Joint Direct Attack Munition configuration built around Boeing's GPS/INS tail kit and either a Mk 84-class general-purpose bomb body or a BLU-109 hard-target penetrator body. U.S. military and Federal Register sources distinguish the KMU-556 Mk 84 configuration from the KMU-557 BLU-109 configuration, while direct conflict-use reporting traces GBU-31/JDAM employment from Kosovo and Afghanistan to Iraq, Yemen, Operation Inherent Resolve, the Israel-Hamas war, and the 2025 Israel-Iran conflict.
Joint Direct Attack Munition (JDAM) guidance kit, GPS/INS guidance tail kit for free-fall bombs, MunitionsMunitionsJoint Direct Attack Munition (JDAM) guidance kitGPS/INS guidance tail kit for free-fall bombsJoint Direct Attack Munition (JDAM) is Boeing's U.S.-origin GPS/INS tail-kit family for converting compatible Mk 80- and BLU-series free-fall bomb bodies into all-weather guided bombs. The family spans 500-, 1,000-, and 2,000-pound bomb-body classes, with standard GBU-31, GBU-32, and GBU-38 records separated from later Laser JDAM and JDAM-ER derivatives. Official Air Force and Navy records document JDAM's 1999 combat debut with NATO B-2 operations during Operation Allied Force.
BLU-109 penetrator warhead, 2,000-pound hard-target penetrator warhead, MunitionsMunitionsBLU-109 penetrator warhead2,000-pound hard-target penetrator warheadThe BLU-109 is a U.S.-origin 2,000-pound hard-target penetrator warhead built around a thick forged-steel bomb body for defeating reinforced structures and buried targets. It appears as the bomb body inside guided weapons such as GBU-24 Paveway III and GBU-31 JDAM configurations, with source-backed conflict context ranging from Saudi-led coalition stocks in Yemen to Israeli JDAM-linked use and transfers in Gaza, Lebanon, and the 2025 Israel-Iran fighting.
GBU-32 1,000-pound Joint Direct Attack Munition, 1,000-pound GPS/INS-guided bomb kit, MunitionsMunitionsGBU-32 1,000-pound Joint Direct Attack Munition1,000-pound GPS/INS-guided bomb kitThe GBU-32 1,000-pound Joint Direct Attack Munition is Boeing's GPS/INS JDAM guidance kit applied to the Mk 83 or BLU-110 1,000-pound bomb-body class. JDAM is a conversion kit rather than a stand-alone bomb, and the GBU-32 sits in the middle of the JDAM family between 500-pound and 2,000-pound variants. Direct conflict-use sources connect the GBU-32 to U.S. Navy, U.S. Air Force, and NATO-led coalition operations in Afghanistan, Iraq, Libya, and 2014 Operation Inherent Resolve, while OHCHR reported suspected Israeli use of GBU-32 bombs in Gaza strikes during the 2023 Israel-Hamas War.
GBU-55 Laser Joint Direct Attack Munition, Reserved 1,000-pound laser/GPS-guided bomb designation, MunitionsMunitionsGBU-55 Laser Joint Direct Attack MunitionReserved 1,000-pound laser/GPS-guided bomb designationThe GBU-55 Laser Joint Direct Attack Munition is the reserved 1,000-pound Laser JDAM designation associated with the GBU-32 JDAM and Mk 83 or BLU-110 bomb-body class. Public sources describe the Laser JDAM concept as a Boeing GPS/INS JDAM fitted with a laser terminal seeker for moving or relocatable targets, while designation references treat GBU-55 as the 1,000-pound member between the 500-pound GBU-54 and 2,000-pound GBU-56 Laser JDAMs.

Sources

Air Force JDAM Fact SheetPublisher: U.S. Air Force | Note: Supports JDAM manufacturer, background, GPS/INS guidance, compatible 2,000-pound BLU-109/Mk 84 payload class, aircraft compatibility, range, and unit-cost context. | Accessed: 2026-06-20Navy JDAM Fact FilePublisher: U.S. Navy | Note: Supports JDAM background, BLU-109 hard-target-penetrator payload, GPS-aided INS guidance, aircraft integration, and accuracy statement. | Accessed: 2026-06-20AFTC JDAM Urgent Operational Need TestingPublisher: Air Force Test Center | Note: Supports GBU-31 background, integration of GPS/INS guidance kits with 2,000-pound hard-target penetrator bombs, and BLU-109 penetrator context. | Accessed: 2026-06-20366th MUNS GBU-31 Version 3 Bomb BuildPublisher: Mountain Home Air Force Base | Note: Supports GBU-31 Version 3 image provenance and identifies the munition as a 2,000 lb BLU-109 bomb body with a JDAM tail kit. | Accessed: 2026-06-20Federal Register JDAM Tail Kit NoticePublisher: Federal Register | Note: Supports KMU-556 as the GBU-31 tail kit for a 2,000-pound Mk 84 bomb body and KMU-557 as the GBU-31 tail kit for a 2,000-pound BLU-109 bomb body. | Accessed: 2026-07-04Advanced F-15 Weapons InventoryPublisher: Boeing | Note: Supports F-15-family external carriage context for the GBU-31 Mk 84 and BLU-109 JDAM configurations. | Accessed: 2026-07-04The Aviationist Israel and U.S. Attack Iran UpdatePublisher: The Aviationist | Note: In the 2025 Israel-Iran Conflict, a GBU-31(V)3/B series JDAM with a 2,000-pound BLU-109 hard-target penetrator warhead was fielded by Israel on an IAF F-15D Baz during the February 2026 Israel-U.S. strike wave, based on open-source image identification reported in the article. | Accessed: 2026-06-22OSMP 1450 Israel-Iran BLU-109 GBU-31 JDAMPublisher: Open Source Munitions Portal | Note: In the 2025 Israel-Iran Conflict, OSMP cataloged Israeli Air Force imagery dated June 13, 2025 as an air-delivered BLU-109 and GBU-31 JDAM with a JDAM kit. | Accessed: 2026-07-04