R-2A Activity · President's Budget PB2027

Flight Systems

Activity a0·Project 655238 — GROUND BASED STRATEGIC DETERRENT (GBSD)·PE 0605238F·U.S. Air Force
FY2027 Request
$1.45B
▲ 69% vs FY2026
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This activity requests $1.45B in FY2027, 32% of project 655238, up 69% on FY2026. The R-2A exhibit describes it across FY2026–FY2027, including what the FY2027 money is planned to buy.

FY2027 Request
$1,452.8M
▲ 69% vs FY2026
FY2026 Enacted
$858.0M
▲ 64% vs FY2025
FY2025 Actual
$522.6M
Prior year
Planned work

What the FY2027 request buys

Verbatim from the R-2A exhibit for project 655238 of PE 0605238F. This is the budget justification's own description of work that has not happened yet — the one thing no other level of the budget carries.

FY2027 planned work

Continue to implement updated specifications, execute design reviews, and mature critical components like AVE, support systems, specialized support equipment, cybersecurity, and nuclear surety architectures. Continue to refine the Mission Modeling Framework to assess performance against evolving threats. Continue to mature the weapon system through trade studies, modeling, simulation, and analysis. Continue to ensure seamless integration of cryptographic systems and Department of Energy technologies through software development, hardware integration, and collaboration with government agencies. Continue to integrate the ICBM Fuze Modernization and Mk21A Reentry Vehicle to the LGM-35A Sentinel weapon system. Increase efforts to leverage mission partners to conduct in-depth technical analysis, digital modeling, subsystem testing, to maintain a strong technical baseline. Increase efforts to pursue initiatives to optimize the schedule, reduce risks, and minimize lifecycle costs while incorporating evolving threat information and higher-fidelity designs into weapon system assessments. Increase efforts to develop an adaptable industrial base by developing mission effectiveness capabilities, thereby improving certification strategies, and developing comprehensive sustainment strategies for all system components.

FY2026 to FY2027 change

Funding increased due to the risk reduction / parallel path efforts identified through the program restructure activities, TMRR efforts to achieve MS-B, and the EMD prime contract schedule incentive fee identified in the "Omni-Mod” contract framework.

Before the request year

FY2026: the year under way

Prior-year accomplishments and current-year plans from the same exhibit. Context for the FY2027 plan, not a series — an activity partitions its project exactly in the request year, but can under-cover it in earlier years.

FY2026 plans — current year

Implement updated specifications, execute design reviews, and mature critical components like AVE, support systems, cybersecurity, and nuclear surety architectures. Refine the Mission Modeling Framework to assess performance against evolving threats. Mature the weapon system through trade studies, modeling, simulation, and analysis. Ensure seamless integration of cryptographic systems and Department of Energy technologies through software development, hardware integration, and collaboration with government agencies. Integrate the ICBM Fuze Modernization and Mk21A Reentry Vehicle to the LGM-35A Sentinel weapon system. Leverage mission partners to conduct in-depth technical analysis, subsystem testing, to maintain a strong technical baseline. Pursue initiatives to optimize the schedule, reduce risks, and minimize lifecycle costs while incorporating evolving threat information and higher-fidelity designs into weapon system assessments. Establish an adaptable industrial base by developing mission effectiveness capabilities, thereby improving certification strategies, and developing comprehensive sustainment strategies for all system components.

Money

Three years, and no five-year plan

An R-2A activity publishes the prior year, the current year and the budget year. The FYDP outyears exist at project and program-element level and are deliberately absent here rather than inferred. Estimate types are colored and never summed into one figure.

4008001,2000522.6FY25ACTUAL858.0FY26ENACTED1,452.8FY27REQUEST
Actual Enacted Request
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual522.6
FY2026Enacted858.0
FY2027Request1,452.8

This activity is 32% of project 655238's FY2027 request and 32% of PE 0605238F's. In the request year the activities under a project sum to it exactly; in the current year they under-cover it in about 9% of cases, so an activity's delta can legitimately exceed its parent's and the two must not be compared row to row.

Where this sits

7 activities in project 655238

Every R-2A line of this project, largest FY2027 request first. Linked where the activity has enough of its own narrative to carry a page; the rest are shown in full on the program-element page.

Source
FY2027 Department of the Air Force RDT&E Budget Justification · Exhibit R-2A · PE 0605238F, project 655238 (President's Budget PB2027). Congressional marks are recorded on the program element, never on an activity.
Machine access
Markdown twin /programs/0605238F/655238/a0.md · MCP mcp.hitchintel.combudget_get_activity