Exhibit 21

Subsidiaries of Alliant Techsystems Inc.

as of March 31, 2010

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

Subsidiaries	State or Other Jurisdiction of Incorporation or Organization
·    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
·    ATK Insurance Company		Vermont
·    Eagle Industries Unlimited, Inc.		Missouri
·    Eagle Mayaguez, LLC		Missouri
·    Front Line Defense International, Inc.		Puerto Rico
·    Eagle New Bedford, Inc.		Missouri
·    Eagle Industries del Caribe, Inc.		Puerto Rico
·    Eagle Industries International, Inc.		Bahamas

On April 9, 2010, ATK established a new wholly-owned subsidiary, Blackhawk Industries Products Group LLC, which is incorporated in Virginia.