Exhibit 21

Subsidiaries of Alliant Techsystems Inc.

as of March 31, 2012

All subsidiaries listed below are 100% owned except where noted.

	State or Other Jurisdiction of
Subsidiaries	Incorporation or Organization
·   Alliant Techsystems Operations LLC	Delaware
·   ATK Commercial Ammunition Holdings Company Inc.	Delaware
·   ATK Commercial Ammunition Company Inc.	Delaware
·   Federal Cartridge Company	Minnesota
·   Ammunition Accessories Inc.*	Delaware
·   ATK Launch Systems Inc.	Delaware
·   ATK Space Systems Inc.	Delaware
·   COI Ceramics, Inc. (65% Ownership)	California
·   ViviSat LLC (50% Interest)	Delaware
·   Eagle Industries Unlimited, Inc.	Missouri
·   Eagle Industries del Caribe, Inc.	Puerto Rico
·   Eagle Industries International, Inc.	Bahamas
·   Eagle Mayaguez, LLC	Missouri
·   Front Line Defense International, Inc.	Puerto Rico
·   Eagle New Bedford, Inc.	Missouri
·   ATK Insurance Company	Vermont

* Effective April 1, 2012, Ammunition Accessories Inc. merged into Federal Cartridge Company.