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ATK Unveils its Newest Medium Caliber Cannon at AUSA

ATK Lightweight 25mm (LW25) Brings Chain Gun« Lethality, Flexibility and Reliability to Remote Weapon Station Applications
In its First Public Appearance, Cannon is Integrated into CROWS Mounted on Up-Armored HMMWV

MINNEAPOLIS, Oct. 8 /PRNewswire-FirstCall/ -- Alliant Techsystems (NYSE: ATK) is unveiling its newest Chain Gun®, the Lightweight 25mm (LW25), at the AUSA Annual Meeting and Exposition in Washington D.C. today. The system has been integrated into the Common Remotely Operated Weapons Station (CROWS) and mounted on an up-armored HMMWV for the event.

"ATK's Lightweight 25 cannon offers enhanced lethality, flexibility and reliability for numerous combat platforms such as the High Mobility Multipurpose Wheeled Vehicle (HMMWV), Stryker, Mine Resistant Ambush Protected vehicle (MRAP) and Infantry Fighting Vehicle (IFV)," said ATK Ammunition Systems Group President Mark DeYoung. "Because the Lightweight 25 can be remotely-operated from inside the protection of an armored vehicle, it is the natural choice for future light armaments."

The LW25 features a dual feed system with first-round-select. This allows the warfighter to switch between two different types of ammunition with the flick of a switch. The LW25 system will employ a full compliment of training and tactical ammunition that includes: target practice, less lethal, armor piercing and high explosive rounds. Most importantly, the LW25 will be capable of firing airburst munitions that leverage ATK's turns count fuze technology used in the 30mm MK310 Programmable Airburst Munitions (PABM) currently under qualification by the U. S. Navy for the U. S. Marine Corps' Expeditionary Fighting Vehicle.

Compared to the MK19 40mm grenade machine gun, used in most remote weapon stations today, the LW25 system offers greater range and lethality, twice the projectile velocity, with a 30% weight reduction in ammunition.

ATK is a $4 billion advanced weapon and space systems company employing approximately 16,500 people in 21 states. 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: 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:

   Brian Grace                                  Steve Wold
   Phone:  952-351-5574                         Phone:  952-351-3056
   E-mail:  brian.grace@atk.com                 E-mail:  steve.wold@atk.com

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