M777 Mods

The M777 Mods program is a key line item in the Army's FY 2026 budget, focused on the continued modernization and sustainment of the Lightweight 155mm Howitzer (LW155), also known as the M777A2. This program is a joint effort between the United States Army and the United States Marine Corps (USMC), with the primary goal of providing direct, reinforcing, and general support artillery fire to maneuver forces. The M777A2 is widely fielded across both services, including Army Stryker Brigade Combat Teams (SBCT), Infantry Brigade Combat Teams (IBCT), and the National Guard, as well as all active Marine Corps units.

The main objective of the M777 Mods line item is to fund critical hardware and software modifications to the system's Digital Fire Control System (DFCS). The DFCS is essential for the howitzer's ability to deliver precision fires, including the use of advanced munitions such as the Excalibur precision-guided projectile. Modernization efforts include upgrades to mission computers, software defined radios, Chief of Section Displays, and Assured Position, Navigation, and Timing (A-PNT) systems. These enhancements are necessary to maintain interoperability, improve survivability, and ensure the system remains effective in modern combat environments.

For FY 2026, the budget continues to support the retrofit of previously procured DFCS hardware and software modifications. This funding supports the completion of modernization activities that began in prior years, with a particular focus on maintaining system readiness and compliance with evolving Army and joint service requirements. The decrease in funding from FY 2025 to FY 2026 reflects the near completion of major procurement activities for upgraded DFCS components and APNT compliance initiatives.

The M777 Mods program also supports the Army's obligation to provide capabilities for homeland defense, domestic emergency response, and military support to civil authorities, as mandated by Section 1815 of the FY 2008 National Defense Authorization Act. This ensures that both active and reserve components have access to modernized artillery systems capable of responding to a range of missions, from combat operations to disaster relief.

A key justification for continued investment in the M777 Mods line item is the system's proven operational performance and its technological advantages over legacy systems. The M777A2's use of high-strength titanium alloys and hydraulic systems results in significant weight savings, faster emplacement and displacement times, and improved survivability compared to the older M198 howitzer. These features enhance the mobility and effectiveness of artillery units in both expeditionary and conventional operations.

The program's modernization efforts are coordinated between the Army and the USMC, ensuring a unified approach to sustainment, upgrades, and fielding. This joint service collaboration maximizes the return on investment and ensures that both services benefit from the latest technological advancements. The upgrades funded under this line item are critical to keeping the M777A2 relevant against current and future threats, particularly in contested environments where precision fires and assured navigation are essential.