8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  September 12, 2006

Alliant Techsystems Inc.

(Exact name of registrant as specified in its charter)

Delaware	1-10582	41-1672694
(State or other jurisdiction	(Commission	(I.R.S. Employer Identification
of incorporation)	File Number)	No.)
5050 Lincoln Drive
Edina, Minnesota		55436-1097
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code:  (952) 351-3000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events

On September 12, 2006, Alliant Techsystems Inc. (ATK) announced that it has successfully completed the sale of its previously announced $300 million offering of 2.75 percent convertible senior subordinated notes due 2011.

ATK also announced that it used a portion of the proceeds from the offering to purchase approximately $100 million of shares of ATK common stock.  ATK will use the remainder of the proceeds to make a contribution to its defined benefit pension plan and for other general corporate purposes.

A copy of the press release is filed as Exhibit 99.1 to this report and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits

(d)           Exhibits.

Exhibit No.	Description
99.1	Press release announcing the completion of the sale of Alliant Techsystems Inc.’s previously announced $300 million offering of 2.75 percent convertible senior subordinated notes.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

		ALLIANT TECHSYSTEMS INC.
	By:		/s/ John L. Shroyer
	Name:		John L. Shroyer
	Title:		Senior Vice President and Chief Financial Officer
Date:  September 13, 2006

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EX-99.1

Exhibit 99.1

News Release Corporate Communications MN01-1030 5050 Lincoln Drive Edina, MN 55436 Phone:  952-351-3087 Fax:  952-351-3009

For Immediate Release

Media Contact:	Investor Contact:
Bryce Hallowell	Steve Wold
Phone: 952-351-3087	Phone: 952-351-3056
E-mail: bryce.hallowell@atk.com	E-mail: steve_wold@atk.com

ATK COMPLETES SALE OF $300 MILLION OF CONVERTIBLE SENIOR
SUBORDINATED NOTES

Minneapolis, September 12, 2006 – ATK (Alliant Techsystems, NYSE:  ATK) today announced that it has successfully completed the sale of its previously announced $300 million offering of 2.75 percent convertible senior subordinated notes due 2011.  The offering was made in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933.

ATK used a portion of the proceeds from the offering to purchase approximately $100 million of shares of ATK common stock.  The company will use the remainder of the proceeds to make a contribution to its defined benefit pension plan and for other general corporate purposes.

The convertible notes and the shares of common stock issuable upon conversion are not registered under the Securities Act or the securities laws of any other jurisdiction and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act.

Certain information discussed in this press release constitutes forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995.  Although ATK believes that the expectations reflected in such forward-looking statements are based on reasonable assumptions, it can give no assurance that its expectations will be achieved.  Forward-looking information is subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those

projected. Among those factors are: changes in governmental spending, budgetary policies and product sourcing strategies; the company’s competitive environment; the terms and timing of awards and contracts; pension asset returns and assumptions on future returns; discount rates, service costs and funding; access to capital markets and the costs thereof, changes in accounting standards, the company’s capital deployment strategies, including debt repayment and share repurchases; and general economic conditions.  ATK undertakes no obligation to update any forward-looking statements. For further information on factors that could impact ATK, and statements contained herein, please refer to ATK’s most recent Annual Report on Form 10-K and any subsequent quarterly reports on Form 10-Q and current reports on Form 8-K filed with the U.S. Securities and Exchange Commission.

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