ATK to Feature Major Programs at the 10th International Defence Exhibition and Conference (IDEX) in Abu Dhabi

ATK to Highlight Affordable Innovation for an International Audience

MINNEAPOLIS, February 13, 2011 - ATK (NYSE: ATK) announced today it will participate as an exhibitor at
the 10th International Defence Exhibition and Conference in Abu Dhabi, United
Arab Emirates. ATK will highlight a variety of capabilities and programs
during the conference at the Abu Dhabi National Exhibition Centre Feb. 20-24.
The ATK exhibits are located in Hall 3, Stand B11.

ATK's booth will feature its lightweight remote weapon system
capabilities that deliver lethality overmatch, flexibility and modularity to
land, air and naval platforms. Specifically, ATK's Modular Advanced Weapon
System (MAWS) is a total weapon solution capable of integrating the company's
family of medium-caliber chain guns(R) and ammunition, and features an open
architecture that allows for integration of most light, medium, and heavy
machine guns. The MAWS man-machine interface provides intuitive under armor
operation and maximum situational awareness that improves soldier safety and
ensures mission success in defense of existing and future threat platforms.

IDEX will also provide customers the opportunity to obtain information on
ATK's special mission aircraft portfolio, which provides affordable,
responsive and advanced capabilities to customer-preferred platforms. ATK's
expertise includes outfitting various aircraft with integrated intelligence,
surveillance and reconnaissance (ISR) capabilities, fire control equipment
and air-to-ground weapons capability. This provides customers an enhanced
capability to conduct responsive defense, counterinsurgency, and
border/coastal surveillance and security missions.

Also on display are ATK's innovative precision weapon system technologies
such as the Mortar Guidance Kit (MGK), which combines GPS guidance and fuzing
into one package, transforming conventional 120mm mortars in to precision
munitions.

ATK will feature its combat-proven AAR-47 Missile Warning System. The
AAR-47 is an electronic warfare system designed to protect helicopters and
aircraft against surface-to-air missile threats. It also alerts aircrews to
threats from laser-guided and laser-aided weapons, and is credited with
saving numerous military aircrew lives and aircraft from attack.

The booth will showcase ATK's family of 120mm tank ammunition. ATK and
its industry partners provide the world's most advanced, combat-proven and
cost-effective tactical and training tank ammunition. This ammunition has
been designed for use and demonstrated in several main battle tanks including
the Abrams and Leopard 2.

ATK will display the Advanced Anti-Radiation Guided Missile (AARGM) which
provides the warfighter with the latest and most advanced weapon system for
engaging and destroying enemy air defenses and time-critical, mobile targets.
The AARGM system is a cooperative U.S. and Italian acquisition program, with
the U.S. Navy as the executive agent.

Additionally, ATK will also have on view advanced artillery and bomb
fuzes, as well as its Insensitive Munitions (IM) solid rocket motor
technologies. Designed to satisfy emerging mission requirements and enhanced
safety for the next generation of international weapon systems. ATK's
affordable IM technologies have met or exceeded all required IM tests by the
US Government.

ATK's innovative business approach is one reason the company is the world
leader in small- and medium-caliber ammunition. As the primary source for
small-caliber ammunition for the U.S. Armed Forces, ATK has the unique
expertise in ammunition design, development, manufacturing, supply chain
management, quality assurance as well as facility management and
modernization. ATK will display a number of products from its small- and
medium-caliber portfolio, including its innovative family of products with
new high-technology options for specialized applications. Visitors to the ATK
booth will see a sampling of the broad portfolio of non-standard (non-NATO)
ammunition and weapons ATK procures and delivers with proven quality and
on-time delivery assurance.

The company has a long history as a leading global provider of
battle-proven medium-caliber chain guns(R) for multiple platforms. The
cannons will be on display in the IDEX booth, including the 30mm M230 and its
link fed variant.

ATK will also display the latest tactical gear from its Eagle and
Blackhawk brands. Items include Modular Lightweight Load Carrying Equipment
(MOLLE), individual soldier hydration, releasable body armor systems,
holsters, packs and other gear.

ATK is an aerospace, defense, and commercial products company with
operations in 24 states, Puerto Rico, and internationally, and revenues of
approximately $4.8 billion. News and information can be found on the Internet
at www.atk.com.

    Media Contact:                     Investor Contact:

    Amanda Covington                   Jeff Huebschen
    Phone: +1-801-779-4625             Phone: +1-952-351-2929
    E-mail: amanda.covington@atk.com   E-mail: jeff.huebschen@atk.com

Media, Amanda Covington, +1-801-779-4625, amanda.covington at atk.com, or Investors, Jeff Huebschen, +1-952-351-2929, jeff.huebschen at atk.com, both of ATK