Military Finances Development of Outer Wing Mounts for B-1 Bomber, Pursuing Enhanced Weapon Capacity and Hypersonic Test Opportunities
The U.S. Air Force is currently developing the External Heavy-Stores Pylon program for the B-1B Lancer bomber, aiming to significantly expand its payload capacity and enable the bomber to carry up to 50% more ordnance than before. The program is funded as a "new start" effort in the U.S. Air Force's fiscal year 2026 budget, with over $50 million allocated for its implementation.
Development Timeline
The program has been in development following earlier experimentation phases under the Hypersonic Integration Program, which demonstrated the B-1B's ability to carry a 5,000-pound load on an adaptive modular attachment (LAM) pylon. Boeing was awarded a recent contract in July 2025 to produce the Large Adaptable Modular (LAM) pylons as part of this upgrade, signifying advanced progress toward fleet-wide integration. The current active B-1B fleet stands at 42 aircraft, with plans to restore the fleet to 44 aircraft alongside the pylon enhancements.
Compatible Weapons & Payload Enhancements
The new pylons will allow the carriage of a wider variety of standoff munitions, which are weapons launched from a distance to keep the launch platform out of enemy range. Hypersonic missiles are a priority among these, indicating an expansion beyond current conventional bombs and cruise missiles. This capability effectively increases the volume of fires the B-1B can deliver from standoff ranges as an interim solution before the full operational deployment of the stealthy B-21 Raider bomber, which is the designated successor aircraft.
While the exact list of compatible weapons is not exhaustively detailed in the sources, the focus on hypersonic weapons integration indicates support for advanced long-range, high-speed munitions. The B-1 already has six external hardpoints, with one already reopened to carry the Sniper laser electro-optical targeting pod. In addition, the Air Force is developing at least two air-launched hypersonic missiles, including the Hypersonic Air-breathing Weapon Concept (HACM) and the ARRW.
Each of the six pylons on the B-1 can carry two 2,000-pound weapons or one 5,000-pound weapon with the LAM. The Long Range Anti-Ship Missile (LRASM) can address an air-launch capability gap, providing flexible, long-range, advanced, anti-surface capability against high-threat maritime targets. The increased volume of fires off the B-1B can be done in the near term, with the Air Force planning to conduct computational fluid dynamics and wind tunnel testing of various external pylon/weapon configurations in fiscal 2026.
Summary
| Aspect | Details | |-----------------------------|------------------------------------------------| | Program name | External Heavy-Stores Pylon Program | | Funding | $50+ million in FY 2026 budget | | Program status | Contract awarded to Boeing in mid-2025; ongoing development and production | | Payload capacity increase | Up to 50% more ordnance carriage | | Primary new compatibility | Hypersonic missiles and diverse standoff munitions | | B-1B fleet size | 42 active, aiming for 44 in next fiscal year | | Purpose | Increase interim bomber firepower pending B-21 arrival |
This program modernizes the aging B-1B fleet to maintain operational relevance and firepower in the near term while bridging to the next-generation B-21 bomber era.
- The External Heavy-Stores Pylon Program for the B-1B Lancer bomber, currently in development, aims to enhance the bomber's carrier capacity for a wider variety of weapons such as hypersonic missiles, making it capable of delivering a greater volume of fires.
- The U.S. Air Force is pushing for the integration of advanced long-range, high-speed munitions, as indicated by the focus on hypersonic weapons for the B-1B aircraft's new pylons.
- As a result of the program's development, the B-1B fleet may be expanded from 42 aircraft to 44 aircraft, while also becoming compatible with a range of standoff munitions including hypersonic missiles.
- To ensure the proper functioning and integration of the new weapon systems, the Air Force plans to conduct computational fluid dynamics and wind tunnel testing of various external pylon/weapon configurations in fiscal 2026.
