X0202 4 2006-05-10 0 0000866121 ALLIANT TECHSYSTEMS INC ATK 0001186660 MCREAVY ROBERT J ALLIANT TECHSYSTEMS INC. 5050 LINCOLN DRIVE EDINA MN 55436-1097 0 1 0 0 VP and Treasurer Common Stock 2006-05-10 4 M 0 2250 43.155 D 2721 D Common Stock 2006-05-10 4 M 0 6000 47.746 D 8721 D Common Stock 2006-05-10 4 M 0 1750 59.12 D 10471 D Common Stock 2006-05-10 4 S 0 600 83.55 D 9871 D Common Stock 2006-05-10 4 S 0 9400 83.25 D 471 D Common Stock 408.3413 I By 401(k) plan Employee Stock Option (right to buy) 43.155 2006-05-10 4 M 0 2250 0 D 2011-06-04 Common Stock 2250 0 D Employee Stock Option (right to buy) 47.746 2006-05-10 4 M 0 6000 0 D 2012-01-22 Common Stock 6000 0 D Employee Stock Option (right to buy) 59.12 2006-05-10 4 M 0 1750 0 D 2013-01-21 Common Stock 1750 10250 D Phantom Stock Units 2006-05-10 4 I 0 2202 83.44 D Common Stock 2202 3309 D Includes 471 shares held in the Issuer's Employee Stock Purchase Plan as of March 31, 2006. Based on an on-line summary dated May 10, 2006. Options became exercisable in three equal annual installments beginning 06/04/2002. Options became exercisable in three equal annual installments beginning 01/22/2003. Options became exercisable in three equal annual installments beginning 01/21/2004. 1-for-1. Pursuant to the Issuer's Nonqualified Deferred Compensation Plan (NQDCP), the reporting person elected to transfer these Phantom Stock Units from the ATK common stock investment account into another investment account within the plan. These Phantom Stock Units are payable 100% in cash following the reporting person's termination of employment or such other date specified by the reporting person, but the reporting person may also elect to transfer funds into other investment accounts within the NQDCP. /s/Robert J. McReavy 2006-05-10