ATK Awarded Contract for Modular Divert and Attitude Control System (MDACS) Technology Development and Risk Reduction

 ATK Awarded Contract for Modular Divert and Attitude Control System (MDACS)
                  Technology Development and Risk Reduction

ATK's New MDACS Architecture Supports Longer Mission Timelines to Engage More
Capable Threats

ATK's Ship-Board Compatible MDACS System Provides Key Performance Upgrades

PR Newswire

ARLINGTON, Va., Dec. 3, 2012

ARLINGTON, Va., Dec. 3, 2012 /PRNewswire/ --ATK (NYSE: ATK) has been awarded
a $52.7 million contract from the Missile Defense Agency (MDA) to continue
development of Modular Divert and Attitude Control System (MDACS) technologies
applicable to the Standard Missile-3 (SM-3) Block IIB missile interceptors.
The technology contract will be executed by ATK Defense Group's Elkton,
Maryland operation.

The MDACS propulsion system provides the impulse needed for the kinetic
warhead to acquire and lock onto the target, maintain stable flight and
perform end-game maneuvers for final intercept. Specific technologies to be
advanced will include elements of the new MDACS system architecture to address
the longer mission timelines associated with growing threats. ATK's unique
approach to a ship-board compatible MDACS improves the SM-3 Block II kinematic
performance, providing a key performance upgrade to the missile.

"We are excited for the opportunity to work with the MDA to continue to
develop the MDACS propulsion technology suite," said Cary Ralston, vice
president and general manager of ATK Missile Products. "We look forward to
applying our unique technical expertise in controllable solid propulsion
solutions for this critical defense capability."

ATK has produced more than 165 solid DACS (SDACS) for the SM-3 program.ATK
has more than 35 years of experience in developing and manufacturing missile
defense DACS and has built a strong engineering team dedicated to driving
innovative solutions for future interceptors.

ATK Defense Group is an industry leader in ammunition, precision and strike
weapons, missile warning solutions, and tactical rocket motors across air, sea
and land-based systems. ATK is an aerospace, defense, and commercial products
company with operations in 21 states, Puerto Rico and internationally. 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: 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.

Approved for Public Release, 12- MDA-7091 (29 November 12).

Media Contact:                  Investor Contact:
Linda Burcham                   Steve Wold
Phone: 540-831-4748             Phone: 952-351-3056
E-mail: linda.burcham@atk.com  E-mail: steve.wold@atk.com

SOURCE ATK

Website: http://www.atk.com