# Stand In Attack Weapon — Program Element 0207328F

**Program element:** 0207328F  
**Component:** U.S. Air Force  
**Appropriation:** 3600 — RDT&E, Air Force  
**Budget Activity:** 5 — System Development & Demonstration  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0207328F

## Summary

U.S. Air Force funding falls 54% to a $115.9M request in FY2027, before stepping down 79% across the five-year plan. In the FY2027 defense authorization, the House funded it in full; the Senate funded it in full; House appropriators cut 10% (to $104.1M). AFLCMC/FZA leads the industry work.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 319.6 |
| FY2026 | Enacted | 252.1 |
| FY2027 | Request | 115.9 |
| FY2028 | Outyear | 146.5 |
| FY2029 | Outyear | 29.5 |
| FY2030 | Outyear | 24.2 |
| FY2031 | Outyear | 24.7 |

> Estimate types are not summed — the profile mixes actuals, enacted law, the request, and outyear projections.

## Congressional marks (FY2027)

| Stage | Marked ($M) | Change ($M) |
|---|---|---|
| Request | 115.9 | — |
| House NDAA (HASC) | 115.9 | +0.0 |
| Senate NDAA (SASC) | 115.9 | +0.0 |
| House Approps (HAC-D) | 104.1 | −11.7 |

> FY2027 NDAA authorization marks, as of 2026-07-27. Not appropriations or final law.

## Projects (1)

| Project | Title | FY2025 actual | FY2026 enacted | FY2027 request | Move |
|---|---|---|---|---|---|
| 653133 | Stand In Attack Weapon | 319.6 | 252.1 | 115.9 | −54% |

> Projects are the summable leaves: the program element total is their sum, never added to it.

### Project 653133 — Stand In Attack Weapon

The Stand-in Attack Weapon (SiAW) is currently in development under the Middle Tier of Acquisition (MTA) pathway. SiAW will provide the capability to strike rapidly re-locatable targets that create the Anti-Access/Area Denial (A2/AD) environment. SiAW targets include Theater Ballistic Missile Launchers, Land Attack and Anti-Ship Cruise Missile Launchers, Jammers, Anti-Satellite Systems, and Integrated Air Defense Systems. SiAW missile system development emphasizes agility and innovation by leveraging Digital Engineering (DE) and Weapon Open System Architecture (WOSA) approaches to quickly integrate future capabilities at reduced cost. Interim capability will be pursued through the Navy's Advanced Anti-Radiation Guided Missile-Extended Range (AARGM-ER) program with improved warhead/fuze and F-35 integration (including Universal Armament Interface [UAI] and Mission Planning). The SiAW program is posturing to transition from development under the MTA pathway to production under the Major Capability Acquisition (MCA) pathway in FY2027. FY2027 funds will continue SiAW F-35 aircraft integration efforts (begun in FY2026) and next higher-level assembly development, will mature system security and anti-tamper capabilities, and will invest in increased flight test preparation activities. For the purposes of the MTA, the SiAW missile system will be integrated and tested on a surrogate aircraft. For post-MTA work (MCA) and fielding, SiAW will be integrated on the F-35. The total cost of the SiAW Middle Tier of Acquisition effort is 964.097 million, including RDT&E and procurement of prototype units. The SiAW program is fully funded across the Future Years Defense Program. This requirement supports performance of a full financial audit as required by title 10 U.S.C. Chapter 9A, Sec 240-D. FY27 RDT&E funding for PE 0207328F, Project 653133 is in compliance with budgeted end items per the approved test strategy and FY24 Omnibus, Sec. 8057. This program element includes all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** AFLCMC/FZA (10.0, 8.6%), HX5 (2.1, 1.8%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| F-35 Integration | 34.5 | 28.4 | 48.9 |
| SiAW Development | 197.2 | 219.5 | 15.9 |
| Target/Test Assets, Testing, & Support | 87.9 | 4.2 | 51.1 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

## Where the FY2027 request goes

| Category | Share | $M |
|---|---|---|
| Industry primes | 10% | 12.1 |
| Other / unspecified | 90% | 103.8 |

**Top named industry performers:** AFLCMC/FZA ($10.0M, 8.6%).

> R-3 exhibit contract funding, not USAspending obligations.

## Mission & acquisition strategy

The Stand-in Attack Weapon (SiAW) is currently in development under the Middle Tier of Acquisition (MTA) pathway. SiAW will provide the capability to strike rapidly re-locatable targets that create the Anti-Access/Area Denial (A2/AD) environment. SiAW targets include Theater Ballistic Missile Launchers, Land Attack and Anti-Ship Cruise Missile Launchers, Jammers, Anti-Satellite Systems, and Integrated Air Defense Systems. SiAW missile system development emphasizes agility and innovation by leveraging Digital Engineering (DE) and Weapon Open System Architecture (WOSA) approaches to quickly integrate future capabilities at reduced cost.

The Stand-in Attack Weapon (SiAW) program will utilize a multi-phase approach to migrate advanced technologies and weapon designs into an Model Based System Engineering (MBSE) environment and then rapidly evolve the designs for an initial capability followed by a more comprehensive capability. The first Phases (1 & 2) have been approved as an MTA program and will focus on the integration of key technologies, the implementation of Digital Engineering (DE), a competitive selection, and targeted initial capability on a surrogate aircraft in less than 5 yrs, followed by transition to an MCA and integration on the F-35. The SiAW MTA for Rapid Prototyping is fully funded.

## Related program elements

- [0604735F — Combat Training Range Equipment](https://hitchintel.com/programs/0604735F) (Air Force)
- [0604742A — Constructive Simulation Systems Development](https://hitchintel.com/programs/0604742A) (Army)
- [0605215N — Mission Planning](https://hitchintel.com/programs/0605215N) (Navy)
- [0605235A — Strategic Mid-Range Capability](https://hitchintel.com/programs/0605235A) (Army)

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibits R-2/R-3, PE 0207328F (PB PB2027); FY2027 NDAA committee marks (as of 2026-07-27).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="0207328F")`.

*HitchAI is an independent intelligence service, not affiliated with the U.S. Department of Defense. Budget figures are requests/estimates, not obligations.*