ATK Receives More Than $50 Million for Continued Production of 20mm PGU Ammunition / Order is Second Option on ATK Contract that Could Exceed $170 Million by 2013

MINNEAPOLIS, Sept. 23 /PRNewswire/ -- Alliant Techsystems has received an order valued at more than $50 million from the U.S. Army Contracting Command, Rock Island Contracting Center (RICC), Rock Island, Ill., to produce multiple variants of 20mm PGU ammunition. This is the second order under a contract originally signed in September 2008. If all options are exercised, ATK's contract is expected to exceed $170 million by 2013.

ATK will produce PGU-27A/B Target Practice (TP), PGU-30A/B Target Practice-Tracer (TP-T), PGU-28A/B Semi-Armor Piercing High Explosive Incendiary (SAPHEI) ammunition, a PGU-28A/B SAPHEI and PGU-30A/B TP-T linked configuration, and a PGU-27A/B TP and PGU-30A/B TP-T linked configuration. These cartridges are used on the U.S. Air Force's F-15 and F-16, the U.S. Navy and Marine Corps F-18, and the U.S. Marine Corps Cobra AH-1 helicopter.

ATK's Integrated Weapon Systems Division in Mesa, Ariz. was awarded the contract and will produce the ammunition in Independence, Mo.

ATK is a premier aerospace and defense company with more than 18,000 employees in 24 states, Puerto Rico and internationally, and revenues of approximately $4.8 billion. News and information can be found on the Internet at http://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: assumptions related to total contract orders for 20mm ammunition; changes in governmental spending, budgetary policies and product sourcing strategies; 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, please refer to ATK's most recent Annual Report on Form 10-K and any subsequent quarterly reports on Form 10-Q and current reports on Form 8-K filed with the U.S. Securities and Exchange Commission.

Media Contact: Investor Contact: Amanda Covington Jeff Huebschen Phone: [phone] Phone: [phone] E-mail: [e-mail] E-mail: [e-mail]

ATK

CONTACT: Media, Amanda Covington, [phone],
[e-mail], or Investors, Jeff Huebschen, [phone],
[e-mail], both of ATK

Web Site: http://www.atk.com/