ATK Receives Multi-million Dollar Contract to Produce Composite Fan Containment Cases for GEnx Engines

Contract Marks ATK’s Emergence as a Supplier of Commercial Aircraft Engine Components

Minneapolis, August 1, 2006 – Alliant Techsystems (NYSE: ATK) has received a multi-year, multi-million dollar contract from General Electric (NYSE: GE) to produce fan composite containment cases for its GEnx engine. The GEnx engine is designed to provide lower operating costs and greater fuel efficiency for the new Boeing 747-8. The five-year contract highlights ATK’s emerging role as a provider of large-scale composite components for aircraft engines.

The GEnx engine is the world’s only jet engine that incorporates both a front fan composite containment case and composite fan blades. The new engine will reduce the aircraft’s weight, increase its payload capacity and extend its range.

“ATK is a world-leader in the design, development and production of automated processes for large-diameter composite structures,” said Ray Bronson, Vice President and General Manager, ATK Space Systems and Sensors. “We’re proud to be selected by GE, and we look forward to expanding our role in the commercial aerospace marketplace.”

The first ATK-fabricated GEnx fan composite containment case is scheduled for delivery in the spring of 2007. Design and production of the GEnx containment cases will begin immediately at ATK’s facilities in Clearfield, Utah.

ATK is a $3.4 billion advanced weapon and space systems company employing approximately 15,000 people in 22 states. News and information can be found on the Internet at www.atk.com.

Certain information discussed in this press release constitutes forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Although ATK believes that the expectations reflected in such forward-looking statements are based on reasonable assumptions, it can give no assurance that its expectations will be achieved. Forward-looking information is subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those projected. Among those factors are: the challenges of developing sophisticated composite technologies; the company’s competitive environment; the terms and timing of awards and contracts; and economic conditions. ATK undertakes no obligation to update any forward-looking statements. For further information on factors that could impact ATK, and statements contained herein, reference should be made to ATK’s filings with the Securities and Exchange Commission, including quarterly reports on Form 10-Q, current reports on Form 8-K, and ATK’s Annual Report on Form 10-K for the fiscal year ended March 31, 2006.

Contact Information

Bryce Hallowell

Corporate Communications

Alliant Techsystems

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