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Lockheed Flexes To Modular AGM-158 JASSM Missile Concept

15 September 2026 at 19:27

Lockheed Martin has unveiled a modular airframe concept for its stealthy and combat-proven AGM-158 Joint Air-to-Surface Standoff Missile (JASSM) family that could support multiple configurations, launch methods, and sensor packages while making use of the existing JASSM and Long-Range Anti-Ship Missile (LRASM) production infrastructure. Highly survivable, the missiles are an incredibly important and staple weapon for the U.S. military, and for select export customers.

Called AGM-158 FLEX, the new concept is centered on a common airframe with interchangeable components. Lockheed Martin says it has invested more than $35 million of its funds in the effort so far, including airframe design, testing, prototype production, subsystem qualification, and work with suppliers.

U.S. Air Force Staff Sgt. Joseph Herdliska, 131st Aircraft Maintenance Squadron load crew member, prepares to load an AGM-158 Joint Air-to-Surface Standoff Missile onto the B-2 Spirit weapons load trainer during a weapons load competition at Whiteman Air Force Base, Mo., Jan. 23, 2015. The competition is designed to showcase the teamwork, precision and attention to detail amongst Airmen in support of nuclear deterrence and global strike operations. (U.S. Air Force photo by Airman 1st Class Joel Pfiester/Released)
An Air Force load crew member prepares to load an AGM-158 Joint Air-to-Surface Standoff Missile onto the B-2 Spirit weapons load trainer during a weapons load competition at Whiteman Air Force Base, Missouri. U.S. Air Force photo by Airman 1st Class Joel Pfiester/Released Tech. Sgt. Joel Pfiester

The company says the FLEX design will use removable nose sections that can accommodate sensor suites associated with the AGM-158 family. A removable boat tail would allow the same basic airframe to be configured for different launch methods, including air, surface, and subsurface launch. That would open the AGM-158 architecture up to ground-, ship-, and submarine-launched applications, although Lockheed Martin has not provided details on the specific launchers, platforms, or configurations envisioned. It’s worth noting the LRASM has been tested in vertical launch configuration for vessels equipped with the Mk 41 launch system.

A 2016 test of LRASM from a Mk 41 launcher on the Navy’s Self Defense Test Ship. Lockheed Martin

In addition to the Navy vertical launch tests, the idea of moving the JASSM family beyond its traditional combat aircraft launch platforms is not new. The Air Force’s Palletized JASSM concept, better known as Rapid Dragon, has demonstrated the ability to deploy JASSM-ER from palletized launchers carried inside cargo aircraft, using an expendable airdrop system. FLEX takes a different approach by building those kinds of launch options into the airframe architecture itself, with modularity supporting various launch configurations for the same basic weapon.

For aircraft-launched weapons, Lockheed Martin says FLEX will retain compatibility with current and future JASSM and LRASM launch platforms.

NAS PATUXENT RIVER, Md. -- An F-35 Lightning II test pilot conducts the first flight test to certify the F-35B short takeoff and vertical landing variant of the fighter aircraft for carrying the AGM-158C Long-Range Anti-Ship Missile (LRASM). As part of ongoing weapon integration efforts, the Pax River F-35 Integrated Test Force (Pax ITF) team for the first time flew test flights Jan. 14 with two AGM-158 loaded on external stations. LRASM is a defined near-term solution for the Offensive Anti-Surface Warfare (OASuW) air-launch capability gap that will provide flexible, long-range, advanced, anti-surface capability against high-threat maritime targets. The Pax River ITF’s mission is to effectively plan, coordinate, and conduct safe, secure, and efficient flight test for F-35B and C variants, and provide necessary and timely data to support program verification / certification and fleet operational requirements.
An F-35B carrying the AGM-158C Long-Range Anti-Ship Missile (LRASM). U.S. Marine Corps Kyra Helwick

The company is also proposing multiple airframe lengths. A 206-inch configuration is associated with the supersized JASSM-XR, while a 168-inch version is consistent with the dimensions of JASSM-ER. Lockheed Martin says JASSM-XR will be the first configuration of the FLEX airframe.

The AGM-158 family has already grown well beyond the original JASSM. The AGM-158A is the baseline stealthy air-launched land-attack missile, with a publicly reported range of roughly 230-330 miles, while the AGM-158B JASSM-ER uses a more efficient engine and additional fuel to roughly double that reach, to around 575 miles or more.

Alongside the land-attack variants is the AGM-158C LRASM, which uses the JASSM airframe but substitutes a sophisticated imaging infrared anti-ship seeker, electronic support measures, datalink, and other capabilities, for operations against heavily defended surface combatants.

A U.S. Air Force B-2 Spirit Stealth Bomber, assigned to the 509th Bomb Wing, deploys an AGM-158C Long Range Anti-Ship Missile to support a live-fire sinking exercise as part of Valiant Shield 2026 over the Philippine Sea, June 27, 2026. The B-2 flew into the Mariana Island Range Complex to successfully employ the AGM-158C LRASM and demonstrated flexibility across the globe and hold maritime vessels at risk. (U.S. Air Force photo by Tech Sgt. Thomas Barley)
A B-2 deploys an AGM-158C Long Range Anti-Ship Missile to support a live-fire sinking exercise as part of Valiant Shield 2026 over the Philippine Sea, June 27, 2026. U.S. Air Force photo by Tech Sgt. Thomas Barley Tech. Sgt. Thomas Barley

Finally, the much larger JASSM-XR is being developed with a substantially stretched fuselage to carry more fuel and a larger 1,000-pound-class warhead, with a range expected to approach or exceed 1,000 miles. This would give it a similar striking capability as the Tomahawk cruise missile, although in a stealthier package.

Beyond range and launch options, the company is pitching its new FLEX concept as a way to simplify future upgrades. Components could be replaced as they become obsolete or new capabilities become available without necessarily requiring a completely new missile design.

That approach could have an industrial-base advantage, particularly as the United States seeks to increase production of long-range weapons. Lockheed Martin says FLEX would use the existing JASSM/LRASM production line, supply chain, mission-planning infrastructure, and software ecosystem rather than establishing an entirely new manufacturing and support architecture.

The company says its JASSM/LRASM production infrastructure includes a 225,000-square-foot facility opened in 2022 with increased automation and a robotic paint line.

Notable, however, is the fact that FLEX is being proposed at a time when the U.S. Air Force is pursuing affordable mass as a key priority.

For example, as part of a slew of low-cost cruise missile offerings, the service has been moving ahead with the Extended Range Attack Munition, or ERAM, a new air-launched missile explicitly intended to provide a relatively low-cost, rapidly producible standoff weapon. The Air Force conducted a live-warhead ERAM test in January of last year, less than 16 months after the program received its initial contract, and described the weapon as a means of generating mass against fixed targets. ERAM is understood to have a range of between 150 and 280 miles, putting it below the reach of the baseline JASSM, let alone the JASSM-ER or XR.

The Extended Range Attack Munition live-fire test on Jan. 22, 2025, at Eglin Air Force Base, Florida. via U.S. Air Force

However, the emerging class of lower-cost weapons are intended very much more to complement than compete with JASSM. While the Air Force plans to buy thousands of the cheaper missile, the JASSM will still be needed to take up the higher end of the cost and capability list.

Lockheed Martin mentions that FLEX should “unlock future cost savings,” but this sounds more about giving customers the ability to swap out components and upgrade capabilities on existing missile rounds, to avoid obsolescence, rather than facilitate mass production.

As it stands, JASSM has evolved into a family of increasingly capable and longer-range weapons, but those capabilities necessarily come with a different set of cost and production considerations than a weapon designed from the outset around large-scale production. Lockheed Martin’s announcement does not disclose a target unit cost for FLEX, nor does it explain how the eventual cost of a FLEX-derived weapon would compare with a baseline JASSM or LRASM. The unit price of the latest subvariants of the JASSM-ER is around $1.2 and $1.5 million, according to official budget documents.

The new weapon is a way of getting more variants and launch options out of the established JASSM/LRASM architecture, potentially with less development work than creating entirely new weapons. Whether that translates into enough savings or production capacity to satisfy the military’s growing demand for large numbers of standoff weapons remains to be seen.

For Lockheed Martin, the proposal also offers a way to extend the relevance of the AGM-158 family as the company and the Pentagon pursue additional range, new launch platforms, and potentially new launch methods.

The flexibility of the missile could be particularly relevant to the Agile Combat Employment concept, and the wider U.S. military in the Indo-Pacific, where forces are expected to operate from a larger number of dispersed and potentially austere locations. A common missile architecture that can be adapted to different launch platforms and different target sets could allow weapons to be positioned and employed across a distributed force rather than tying particular missile variants to particular launchers.

The original JASSM/LRASM has also become a significant export weapon, with Australia, Finland, Poland and several other U.S. allies cleared to acquire variants of the missile. While the advanced capabilities of the weapon have seen its export opportunities carefully controlled, FLEX could potentially open up the market to more customers, including less-advanced, ‘sanitized’ versions.

Pilot and Weapon Systems Officer conduct a pre-flight check on the JASSM-ER loaded to a Royal Australian Air Force F/A-18F Super Hornet at RAAF Base Amberley, Queensland. Australian Department of Defense LAC Campbell Latch

Lockheed Martin’s announcement provides few details on FLEX’s eventual cost, production rate, schedule, or specific performance beyond the stated airframe dimensions. For now, the concept demonstrates that the company is seeking to create a more adaptable architecture around an established missile family, one that has played a critical role in numerous operations since its introduction.

Contact the author: thomas@thewarzone.com

The post Lockheed Flexes To Modular AGM-158 JASSM Missile Concept appeared first on TWZ.

Work At Underground Test Site A New Indicator Of Possible Strikes On Iran’s Pickaxe Mountain Bunker

10 September 2026 at 23:01

Work at a specialized underground weapons test site in New Mexico, contracted earlier this year, was linked to planning for a potential new operation targeting Iranian nuclear facilities, according to a report from CNN. The U.S. military has notably left Iran’s hardest-to-reach site under Pickaxe Mountain untouched so far, but President Donald Trump and other U.S. officials have been openly talking about striking it.

On February 27, the day before U.S. and Israeli forces launched their initial wave of strikes on Iran, the Pentagon’s Defense Threat Reduction Agency (DTRA) quietly announced it had awarded a sole-source deal to Pate Construction Co., Inc., for new construction at the so-called Alternate Seismic Hardrock in Situ Test (ALT-SHIST) site. The work was needed to support an upcoming classified live-fire test. ALT-SHIST is situated within the White Sands Missile Range (WSMR), a sprawling U.S. Army-managed complex in New Mexico’s Jornada del Muerto desert basin. DTRA is a relatively small and obscure organization that plays a leading role in U.S. military efforts to develop new and improved ways to respond to Weapons of Mass Destruction (WMD) threats.

WSMR and DTRA have come up in discussions about strikes on Iran in the past. The U.S. military’s heaviest conventional air-dropped weapon, the 30,000-pound-class GBU-57/B Massive Ordnance Penetrator (MOP) bunker buster bomb, has been extensively tested at multiple sites there in the past. DTRA was also directly involved in its initial development. MOPs made their combat debut during U.S. strikes last year on underground Iranian nuclear facilities at Fordow and Natanz as part of Operation Midnight Hammer. The possibility has been raised that a different site within WSMR may have been used to test the plan of attack against Fordow, which involved two ventilation shafts being hit with six GBU-57/Bs each. The bombs were dropped in rapid succession, with each one burrowing deeper and deeper into the facility below. WSMR also happens to contain the site of the first atomic bomb test in 1945.

A map showing the general location of White Sands Missile Range, with an inset giving a better sense of how expansive it is. Holloman Air Force Base, which juts into the southern end of the range complex, is also highlighted. Google Maps

“The plans for the test [at ALT-SHIST] were connected to the Iran war,” CNN said in its story, published yesterday, citing unnamed sources “familiar with the matter.” Beyond that, the planned testing was tied to a “need to develop a way to target Iran’s deepest-buried underground facilities and, likely, simulate U.S. strikes against specific nuclear facilities.”

CNN said it was unable to independently verify whether or not the test in question had occurred.

A formal justification for the sole-source contract to Pate Construction that DTRA released in February did not mention Iran or elaborate on the need for the new testing at ALT-SHIST, but stressed there was an urgent requirement critical to U.S. national security.

“The services required are the immediate and mission-critical enabling services for a ‘real-world’ national security ordinance [sic; ordnance] test. This is not routine construction; it is the highly specialized remediation and operational preparation of a unique, subterranean test facility at White Sands Missile Range (WSMR),” according to the justification document, which DTRA officials had approved on February 24. “The work is a critical path dependency for a live-fire test designed to validate classified capabilities against rapidly emerging threats.”

“As the incumbent contractor for over a decade, Pate Construction Co., Inc. possesses unparalleled and non-transferable tacit knowledge of this specific subterranean test facility. This is a unique Government structure with complex geological and security considerations, and Pate Construction Co., Inc.’s direct, hands-on experience is a tangible asset that no other source possesses,” the document adds. “Pate Construction Co., Inc. is the only contractor that
currently maintains a fully mobilized presence at WSMR with the specific heavy equipment and security-cleared operators required.”

CNN‘s piece says apparent work at ALT-SHIST was visible in satellite imagery of the site between mid-February and mid-March, but the outlet said it was unable to confirm whether or not this was related to the contract with Pate Construction.

We reviewed satellite imagery showing work at a remote DTRA/STRATCOM test site that coincided with this contracting action, but we couldn’t confirm its purpose.

The Pentagon didn’t respond to our questions regarding the test, and we couldn’t independently confirm it occurred. pic.twitter.com/k8zyvqWy56

— Davis Winkie (@davis_winkie) September 9, 2026

ALT-SHIST is an active test site, and any work observed there earlier this year could well have been linked to other projects. For instance, additional publicly available DTRA contracting documents offer details about planned work on a specific part of the ALT-SHIST site, called Tunnel 7, tracing back to last year, as part of a project nicknamed Millstone Willemite 6 (MW-6).

“This task requires the construction contractor to repair and address the damage to Tunnel 7 caused by prior incidents, in accordance with government-provided designs, specifications, and other contract documents,” according to one contracting document dated September 15, 2025. “The contractor will also be responsible for providing support during testing activities, as well as safing after each test and general support between tests. All tunnel construction must be completed by 15 June 2027.”

“The contractor shall repair a D-shape tunnel and overburden using the D-shape of 20 feet depth and width, inside the tunnel. The contractor shall remove and repair any damage to the ribs, crown, and invert to Tunnel 7,” that same document continues. “After the repair of Tunnel 7, the contractor shall provide general construction support to instrument the tunnel in preparation for testing and then safe the tunnel for re-entry post-testing.”

The schedule for the MW-6-related work indicates that it is separate from what Pate Construction was hired to do at the site back in February.

A view out into a mountainous part of the White Sands Missile Range complex. USACE

ALT-SHIST, which was first established in 1995, is also not the only site DTRA makes use of within WSMR. As its name indicates, it is an alternate to the original SHIST site, use of which began in 1993.

“There was a small addition made to the SHIST site, but that area has been heavily used since 2007,” according to an environmental impact study the U.S. Army Corps of Engineers (USACE) completed in 2015. “The granite bedrock at these sites has been fractured and damaged by extensive testing. There are no existing granite areas adjacent to those sites where similar testing can be performed.”

A map showing the relative locations of SHIST and ALT-SHIST, as well as other test sites, at the northern end of the WSMR complex. USACE

USACE conducted that study in support of the establishment of a new test site at WSMR, simply called the Granite Test Site, to succeed the original SHIST. The Granite Test Site is now in use. There are many more sites within the range complex designed to simulate underground and otherwise hardened targets. This is also just one aspect of the wide array of testing that occurs on a daily basis at WSMR.

All three also appear to have been involved in the testing and development of the Massive Ordnance Penetrator (MOP). 5/10 pic.twitter.com/3aWSYXIZln

— Fabian Hinz (@fab_hinz) June 25, 2025

However, the presence of large areas of undisturbed granite is a key factor here, as that is particularly relevant for testing weapons designed to penetrate into extremely deeply buried facilities. CNN‘s piece yesterday noted that Iran’s Pickaxe Mountain site is built underneath a granite mountain.

“The mountain in White Sands, they specifically picked mountainous areas that were solid rock, and they used state-of-the-art tunneling technology to make the kind of cavities in the mountain that you would put this kind of [Iranian nuclear] facility in,” Gary Stradling, a retired scientist who previously worked for the Department of Energy’s Los Alamos National Laboratory (LANL), told TWZ in an interview last year. “I think that there is a lot of work that DOD has done in these kinds of facilities that is highly classified, and I couldn’t talk to you about it. This is very sophisticated work. It is not casual, and it’s not speculative. These are real experts who are doing the work. Careful, technical, quantitative work to be able to deliver this kind of war-fighting capability to the services.”

TWZ spoke to Stradling, who did work tied to earth-penetrating munitions at various points during his lengthy career, in the wake of Operation Midnight Hammer.

Me, standing at the edge of a MOP crater on a mountain top at White Sands Test Range, where detailed studies of massive earth penetrators were studied for effectiveness against deeply buried targets by the Defense Threat Reduction Agency (DTRA) —formerly Defense Nuclear Agency.… pic.twitter.com/JYq1V2xO6q

— Gary Stradling (@gary_stradling) June 24, 2025

The U.S. military notably did not strike Pickaxe Mountain, which is situated immediately to the southwest of Iran’s nuclear facility at Natanz, during Operation Midnight Hammer. The site also went untouched by Israel during last year’s 12 Day War. American and Israeli forces did not target it during major combat operations earlier this year, either. All of this underscores the targeting challenge the site presents, even for strikes using MOPs, which TWZ explored in detail earlier this year and that has continued to make it a point of particular discussion.

A satellite image taken on August 21, 2026, showing activity around tunnel entrances at Iran’s Pickaxe Mountain site. Satellite image ©2026 Vantor

CNN‘s report yesterday was primarily focused on a new assessment of ongoing construction at Pickaxe Mountain from the Center for Strategic and International Studies (CSIS) think tank in Washington, D.C.

Satellite “images reveal more road activity at Pickaxe Mountain in 2026 than at any point in the site’s history,” according to a report CSIS published yesterday. “There is a clear surge in construction activity in 2026 that corresponds to the raising and hardening of the portal accesses, paving of the internal road network, reinforcement around access areas, and the flattening and removal of excavation spoil.”

“This assessment can neither refute nor substantiate the Israeli intelligence claim that Iran moved centrifuges into Pickaxe Mountain,” CSIS’s report also noted. “The continuous construction, the absence of an increased internal security posture, and the lack of observed nonconstruction vehicles and equipment suggest the underground facility is not yet capable of enrichment work, if that is the intended purpose. Further analysis of daily activity would be needed to establish the site’s pattern of life beyond its current construction footprint.”

A broader overview of Pickaxe Mountain, as well as Iran’s nuclear site at Natanz, seen at the upper right corner, as of August 21, 2026. Satellite image ©2026 Vantor

This is in line with TWZ‘s own previous reporting on Pickaxe Mountain back in July, when there were already signs of growing activity following the establishment of a shaky ceasefire between the United States and Iran the preceding month. As we wrote at that time:

“As with the strikes on Fordow, multiple bombs could be dropped on the same impact point to try to penetrate further down into Pickaxe Mountain. Whether there might be similar ventilation shafts or other weak points that could be exploited at Pickaxe Mountain is unknown. …”

A graphic with details about the employment of MOPs on strikes at Fordow during Operation Midnight Hammer. DOD

“A strike ‘right in the front door’ on the tunnel entrances at Pickaxe Mountain would be another option to at least hamper access to the facility inside for a time. This could be combined with strikes aimed at sections of the tunnel networks that run deeper inside the facility, but that are still close enough to the surface to be reachable by available conventional munitions. For instance, MOPs may not be able to hit the main cavern areas, but they could possibly hit certain tunnels that might lead to them.”

“Even a combined strike on entrances and shallow tunnels at Pickaxe Mountain could still present certain challenges. Firm intelligence on exactly where the tunnels snake under the mountain could be limited, making it difficult to select the best impact points. This is exactly why the U.S. military has been investing heavily in advanced, void-sensing fuzes for MOP and other bunker buster bombs for decades now. These fuzes detect when a munition has penetrated into a sufficiently large space, such as a room or tunnel in an underground facility, to help maximize damage. Fuzes that can effectively ‘count’ floors also help to ensure the munition has burrowed sufficiently deep before detonating.”

…

“…the U.S. military could conduct follow-on strikes on the entry points at Pickaxe Mountain to disrupt any attempt to regain access, as well.”

“Destroying Pickaxe Mountain will be a scientific and targeting challenge,” CSIS also noted in its report yesterday. “It is an underground fortress buttressed by granite. It is one of the only facilities in Iran’s nuclear program that the United States has not yet struck. Structurally degrading Pickaxe Mountain requires more than just kinetic force – it takes actionable high-confidence intelligence and sophisticated mathematical modeling.”

With all this in mind, it is not at all hard to imagine how new testing at ALT-SHIST, as well as other sites, would be essential for exploring additional options for striking Pickaxe Mountain and/or other deeply-buried targets in Iran using MOPs and/or other munitions.

A US Air Force B-2 bomber drops a GBU-57/B MOP during a test. USAF

It’s also worth noting here that GBU-57/Bs are understood to be in relatively short supply, though it is unknown how many of them are currently in inventory. Furthermore, the U.S. Air Force’s B-2 Spirit bombers are currently the only aircraft certified to employ the huge MOPs operationally. There was a report in 2024 that prime contractor Boeing was working to expand its capacity to produce these bombs. A MOP successor, the GBU-76/B Next Generation Penetrator (NGP), is in development now, but prototyping work is expected to run through the end of Fiscal Year 2028.

President Donald Trump certainly has raised the prospect of a strike on Pickaxe Mountain publicly on several occasions since July. He has also repeatedly said that the site is being persistently surveilled, particularly from space.

“There’s another place called Pickaxe Mountain, another nice place. We may have to give them a shot there, too, because someone said there was a little movement at the site,” Trump said yesterday during a speech at a convention the Republican Party is hosting in Dallas, Texas, ahead of this year’s midterm elections. “We don’t need much. We see everything, you know, because of Space Force.”

“We may hit Pickaxe [Mountain] very soon,” the President also said while speaking to reporters at the White House last Friday.

Trump on Pickaxe Mountain: We may have to give them a shot there too. We see everything. We can the see tag on their coat. “Muhammad Al-Fayed” It’s never Muhammad Jones. pic.twitter.com/UQm939OruL

— Acyn (@Acyn) September 10, 2026

Trump on Iran:

We may hit Pickaxe Mountain very soon because if there is anything going on with Pickaxe. pic.twitter.com/kwlHZuV6M7

— Clash Report (@clashreport) September 4, 2026

Whether growing activity at Pickaxe Mountain finally prompts a U.S. strike at the site, either alone or as part of a larger operation, remains to be seen. If and when such a mission is launched, past and future testing at sites like ALT-SHIST in New Mexico will all but certainly have played an important part.

Contact the author: joe@twz.com

The post Work At Underground Test Site A New Indicator Of Possible Strikes On Iran’s Pickaxe Mountain Bunker appeared first on TWZ.

Operational F-15EXs Drop Live Bombs For The First Time

10 September 2026 at 17:49

The Oregon Air National Guard’s 142nd Wing has taken another significant step toward turning the F-15EX Eagle II into a true multirole fighter, conducting the first live-bomb drops from operational F-15EXs during training at Nellis Air Force Base, Nevada. The milestone came during a roughly three-week deployment to Nellis in late August and early September in support of the U.S. Air Force’s Weapons Instructor Course (WIC).

U.S. Air Force Master Sgt. Jay Aebi, non-commissioned officer in charge of weapons loading, 142nd Aircraft Maintenance Squadron, loads a bomb onto an F-15EX Eagle II aircraft at Nellis Air Force Base (AFB), Nevada on August 27, 2026. The 142nd Wing’s fleet of F-15EXs operated at Nellis AFB for three weeks in late August and early September in support of the U.S. Air Force’s Weapons Instructor Course (WIC). During this time, the unit hit a historical milestone, dropping live bombs from operational F-15EXs for the first time. (U.S. Air National Guard photo by Master Sgt. Steph Sawyer)
Weapons technicians from the 142nd Aircraft Maintenance Squadron load a bomb onto an F-15EX at Nellis Air Force Base, Nevada on August 27, 2026. U.S. Air National Guard photo by Master Sgt. Steph Sawyer

Photographs released by the Air National Guard yesterday show F-15EXs from the 142nd Wing carrying live bombs on the flight line and departing Nellis with the weapons loaded. Official imagery shows the jets armed with a single 500-pound Mk 82 freefall bomb on the fuselage centerline, while spotters also captured F-15EXs carrying a 2,000-pound Mk 84 freefall bomb in the same position.

The 142nd’s F-15EXs are only now acquiring a capability that was deliberately absent from the wing’s previous F-15C fleet. The Portland, Oregon-based unit was an air-superiority organization when it operated the F-15C, while the F-15EX is ultimately derived from the F-15E Strike Eagle and has considerably more inherent multirole potential.

As we reported in July, the wing had already begun laying the groundwork for this transition. In May, 142nd personnel traveled to Mountain Home Air Force Base, Idaho, where they loaded and dropped inert BDU-50 and BDU-56 training bombs from their F-15EXs. Those weapons replicate the size and weight of 500-pound-class Mk 82-series and 2,000-pound-class Mk 84-series bombs. Over 10 missions, the crews dropped 24 BDU-50s and 12 BDU-56s.

A BDU-56 is loaded onto an F-15EX assigned to the 142nd Wing during a training mission at Mountain Home Air Force Base, Idaho, in May 2026. U.S. Air Force

While the F-15EX had already been tested in an air-to-ground role by the Air Force’s test community, the Mountain Home deployment was the first time an operational Eagle II unit had loaded and dropped bombs. The next step, the wing said at the time, would be live weapons employment at Nellis.

The Air Force has emphasized that the F-15EX’s primary mission remains defensive and offensive counter-air, particularly in the homeland-defense role. At the same time, the service’s plans call for the aircraft to provide combatant commanders with strike packages capable of operating in contested environments.

An F-15EX fires an AIM-120D missile during a test mission near Eglin Air Force Base, Florida. The F-15EX can carry up to 12 AIM-120 missiles. U.S. Air Force photo by Tech. Sgt. John Raven

The F-15EX is inherently well suited to such a mission. Derived from the Strike Eagle lineage, it combines that aircraft’s large payload capacity and long range with substantially modernized avionics and electronic warfare systems. The aircraft’s design leaves considerable room for additional weapons and mission equipment, making an expansion into air-to-ground operations relatively straightforward compared with trying to add that capability to the F-15C.

The 142nd has been building the institutional knowledge required to make that transition. Three of its pilots underwent a nine-month course covering the science, tactics, and procedures associated with air-to-ground weapons employment before returning to help establish the wing’s training program. Weapons personnel also traveled to Nellis earlier this year to work with F-15Es assigned to the 59th Test and Evaluation Squadron and become certified in bomb loading procedures.

An F-15EX Eagle II aircraft assigned to the Oregon Air National Guard’s 142nd Wing sits on the flight line at Nellis Air Force Base (AFB), Nevada with a live bomb attached to its belly as it prepares for take off on August 27, 2026. The 142nd Wing’s fleet of F-15EXs operated out of Nellis AFB for three weeks in late August and early September in support of the U.S. Air Force’s Weapons Instructor Course (WIC). During this time, the unit hit a historical milestone, dropping live bombs from operational F-15EXs for the first time. (U.S. Air National Guard photo by Master Sgt. Steph Sawyer)
An F-15EX Eagle II assigned to the Oregon Air National Guard’s 142nd Wing sits on the flight line at Nellis Air Force Base, Nevada with a live bomb attached to its belly as it prepares for takeoff on August 27, 2026. U.S. Air National Guard photo by Master Sgt. Steph Sawyer \

As well as teaching pilots how to release a weapon, the wing had to develop an entirely new air-to-ground training pipeline for pilots, maintainers, and weapons personnel at a unit that had not previously operated an aircraft with an operational bombing mission.

Nellis is home to the Air Force’s Weapons School and is central to the Weapons Instructor Course, making it one of the most important locations in the service for developing and evaluating advanced tactics. The 142nd’s participation therefore places its emerging F-15EX air-to-ground capability in an environment specifically focused on integrating advanced weapons, tactics, and mission planning.

U.S. Air Force Staff Sgt. Parker Mayhew (center), a weapons loader assigned to the 142nd Aircraft Maintenance Squadron, prepares a bomb to be loaded onto an F-15EX Eagle II aircraft as U.S. Air Force Senior Airman Alexander Walker (left) looks on, August 26, 2026, Nellis Air Force Base, Nevada. The 142nd Wing’s fleet of F-15EXs operated out of Nellis AFB for three weeks in late August and early September in support of the U.S. Air Force’s Weapons Instructor Course (WIC). During this time, the unit hit a historical milestone, dropping live bombs from operational F-15EXs for the first time. (U.S. Air National Guard photo by Master Sgt. Steph Sawyer)
A weapons loader assigned to the 142nd Aircraft Maintenance Squadron prepares a bomb to be loaded onto an F-15EX at Nellis Air Force Base. U.S. Air National Guard photo by Master Sgt. Steph Sawyer

The wing’s new live bomb-dropping capability also comes as the Air Force continues to explore how broadly the Eagle II can be employed.

Test and evaluation units have already demonstrated that the aircraft can accommodate sophisticated air-to-ground weapons. Earlier this year, an F-15EX from the 85th Test and Evaluation Squadron participated in a munitions-load training event at Kadena Air Base in Japan, where Air Force personnel practiced loading live GBU-53/B Small Diameter Bomb IIs onto the aircraft.

GBU-53/B Small Diameter Bomb IIs sit on a dolly in front of an F-15EX from the 85th Test and Evaluation Squadron during a training event at Kadena Air Base, Japan, on July 8, 2026. U.S. Air Force

The F-15EX is also capable of carrying the conformal fuel tanks used by the F-15E, which can provide additional fuel as well as additional weapons stations. The operational F-15EXs delivered to the 142nd have so far been seen without CFTs, however, and the status of the plan to equip the Oregon aircraft with them remains unclear.

CFTs could become increasingly important if the Air Force moves toward more demanding air-to-ground missions for the Eagle II, particularly those requiring substantial weapons loads and long-range operations.

Another unresolved question is how the Air Force will ultimately crew F-15EXs when they are performing more complex multirole missions.

U.S. Air Force Staff Sgt. Alisha Sargent, a weapons loader assigned to the Oregon Air National Guard’s 142nd Aircraft Maintenance Squadron, loads a bomb onto an F-15EX Eagle II aircraft at Nellis Air Force Base (AFB), Nevada on August 26, 2026. The 142nd Wing operated their fleet of F-15EXs out of Nellis AFB for three weeks in late August and early September in support of the U.S. Air Force’s Weapons Instructor Course (WIC). During that time, the unit and the EX hit a historic milestone, dropping live bombs from operational F-15EXs for the first time. (U. S. Air National Guard photo by Master Sgt. Steph Sawyer)
A weapons loader assigned to the 142nd Aircraft Maintenance Squadron loads a bomb onto an F-15EX at Nellis Air Force Base. U.S. Air National Guard photo by Master Sgt. Steph Sawyer

The Eagle II retains the F-15E family’s two-seat cockpit, although the Air Force’s initial operational concept has generally involved flying the aircraft with a single pilot. That leaves an unused cockpit that could potentially become an important asset as the mission set expands.

Former 142nd Wing commander Col. Michael Kosderka previously told TWZ that the addition of a weapons systems officer or other specialist in the rear cockpit could open the door to more air-to-ground capabilities.

“We can start talking about putting all kinds of air-to-ground capabilities into the airplane, potentially putting WSOs or other experts in the backseat as well to have us do any number of multi-role capabilities that it’s just physically not possible to in the C model,” Kosderka told TWZ in an interview back in 2024. “So the X has tremendous growth capability. It’s really exciting.”

Two crew would be particularly relevant to complex strike missions, where managing sensors, weapons, communications, electronic warfare, and other mission systems can place substantial demands on a single pilot. As we have discussed in the past, a back-seater would also be highly beneficial for the emerging drone controller role.

The Weapons School has also been associated with developing two-seat F-15EX operations, indicating that the second cockpit’s utility is already being considered at the tactical-development level.

142nd Aircraft Maintenance Squadron weapons loaders, U.S. Air Force Staff Sgts. Parker Mayhew (left) and Eric Janson transport a bomb to an F-15EX Eagle II aircraft using a jammer, August 27, 2026, Nellis Air Force Base (AFB), Nevada. The 142nd Wing’s fleet of F-15EXs operated at Nellis AFB for three weeks in late August and early September in support of the U.S. Air Force’s Weapons Instructor Course (WIC). During this time, the unit hit a historical milestone, dropping live bombs from operational F-15EXs for the first time. (U.S. Air National Guard photo by Master Sgt. Steph Sawyer)
142nd Aircraft Maintenance Squadron weapons loaders transport a bomb to an F-15EX at Nellis Air Force Base. U.S. Air National Guard photo by Master Sgt. Steph Sawyer

For now, it would be premature to characterize the F-15EX as an operational replacement for the F-15E Strike Eagle in the air-to-ground role. The 142nd’s newly demonstrated bombing capability remains part of an ongoing training and development process.

Meanwhile, the Air Force is preparing to field substantially larger numbers of F-15EXs. Beyond the 142nd, additional Guard units are planned to receive the type, in California and Louisiana, as well as Michigan.

The Air Force has announced plans to base F-15EXs at Seymour Johnson Air Force Base, North Carolina, where they will eventually replace older F-15Es, which, in turn, are slated to move to Whiteman Air Force Base, Missouri, as part of a broader realignment of the Eagle fleet.

Another two active-duty F-15EX squadrons are slated to replace the former F-15C force at Kadena. The first F-15EX for permanent assignment at Kadena recently departed Boeing’s St. Louis, Missouri, facility for the 142nd Wing, where it will undergo final preparations before its eventual deployment to sprawling Okinawa.

An F-15EX Eagle II aircraft assigned to the Oregon Air National Guard’s 142nd Wing takes off from Nellis Air Force Base (AFB), Nevada with a bomb attached to its belly, August 27, 2026. The 142nd Wing’s fleet of F-15EXs operated out of Nellis AFB for three weeks in late August and early September in support of the U.S. Air Force’s Weapons Instructor Course (WIC). During this time, the unit hit a historical milestone, dropping live bombs from operational F-15EXs for the first time. (U.S. Air National Guard photo by Master Sgt. Steph Sawyer)
An F-15EX assigned to the 142nd Wing takes off from Nellis Air Force Base with a bomb attached to its belly, August 27, 2026. U.S. Air National Guard photo by Master Sgt. Steph Sawyer

The operational implications of the air-to-ground training therefore extend well beyond Portland.

The Eagle II’s generous weapons payload, long range, modern sensors and electronic warfare systems, and ability to carry both air-to-air and air-to-ground weapons give the Air Force a platform that can potentially perform several missions without sacrificing the characteristics that make the F-15 attractive for homeland defense and counter-air operations. The same characteristics are also extremely relevant to any export operator, which would expect to operate the Eagle II in a multirole capacity.

As well as a weapons-training milestone, the first live-bomb drops by the 142nd Wing provide more evidence that the F-15EX’s mission is continuing to evolve.

Contact the author: thomas@thewarzone.com

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