R-2A Activity · President's Budget PB2027

SiAW Development

Activity a1·Project 653133 — Stand In Attack Weapon·PE 0207328F·U.S. Air Force
FY2027 Request
$15.9M
▼ 93% vs FY2026
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This activity requests $15.9M in FY2027, 14% of project 653133, down 93% on FY2026. The R-2A exhibit describes it across FY2026–FY2027, including what the FY2027 money is planned to buy.

FY2027 Request
$15.9M
▼ 93% vs FY2026
FY2026 Enacted
$219.5M
▲ 11% vs FY2025
FY2025 Actual
$197.2M
Prior year
Planned work

What the FY2027 request buys

Verbatim from the R-2A exhibit for project 653133 of PE 0207328F. 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 maturation of subsystems to meet requirements for a fieldable system. These activities include next higher-level assembly development, component/subsystem test efforts and maturation of anti-tamper capabilities. Conduct Integrated Test 2 (IT-2) and Production Readiness Review (PRR) in preparation for MS-C. Begin System Improvement Program (SIP) for AARGM-ER and SiAW.

FY2026 to FY2027 change

Funding decreased due to FY2027 expected completion of SiAW MTA effort and planned transition to MCA pathway and SiAW production.

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

Executed next higher-level assembly development, continued test and fielding Risk Reduction (RR) efforts, matured system security and anti-tamper capabilities and conducted Developmental Test (DT-1) for SiAW weapon system. Used the established Integrated Digital Environments (IDE) for digital engineering, configuration management, and evaluation of system performance utilizing the virtual twin and its associated modeling and simulation capabilities.

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.

501001502000197.2FY25ACTUAL219.5FY26ENACTED15.9FY27REQUEST
Actual Enacted Request
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual197.2
FY2026Enacted219.5
FY2027Request15.9

This activity is 14% of project 653133's FY2027 request and 14% of PE 0207328F'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

3 activities in project 653133

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 0207328F, project 653133 (President's Budget PB2027). Congressional marks are recorded on the program element, never on an activity.
Machine access
Markdown twin /programs/0207328F/653133/a1.md · MCP mcp.hitchintel.combudget_get_activity