Exhibit 32.2

Certification by Chief Financial Officer Pursuant to 18 U.S.C. Section 1350,
as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, Eric S. Rangen, Chief Financial Officer of Alliant Techsystems Inc. (the “Company”), certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1)the Quarterly Report on Form 10-Q for the fiscal quarter ended June 29, 2003, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods expressed in the Report.

Dated: August 12, 2003

/s/ Eric S. Rangen

Eric S. Rangen

Vice President and Chief Financial Officer