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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 A0UWCK/5kEn88bxGqdmqMaINq6iTqdj+1MUQA9KS1U5Z+5TZIYILjgdu7Wsj1ctT
 u03Jfqq+UNjJyhIrrrb49A==

<SEC-DOCUMENT>0001104659-03-011101.txt : 20030523
<SEC-HEADER>0001104659-03-011101.hdr.sgml : 20030523
<ACCEPTANCE-DATETIME>20030523141851
ACCESSION NUMBER:		0001104659-03-011101
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030521
FILED AS OF DATE:		20030523

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FOOTE JEFFREY O
		CENTRAL INDEX KEY:			0001186673

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10582
		FILM NUMBER:		03717945

	BUSINESS ADDRESS:	
		STREET 1:		ONE UTAH CENTER
		STREET 2:		201 SO. MAIN, SUITE 400
		CITY:			SALT LAKE CITY
		STATE:			UT
		ZIP:			84111

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALLIANT TECHSYSTEMS INC
		CENTRAL INDEX KEY:			0000866121
		STANDARD INDUSTRIAL CLASSIFICATION:	ORDNANCE & ACCESSORIES, (NO VEHICLES/GUIDED MISSILES) [3480]
		IRS NUMBER:				411672694
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		5050 LINCOLN DRIVE
		CITY:			EDINA
		STATE:			MN
		ZIP:			55436-1097
		BUSINESS PHONE:		9523513000

	MAIL ADDRESS:	
		STREET 1:		5050 LINCOLN DRIVE
		CITY:			EDINA
		STATE:			MN
		ZIP:			55436-1097
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>j1523_4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType>
  <periodOfReport>2003-05-21</periodOfReport>
  <notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000866121</issuerCik>
        <issuerName>ALLIANT TECHSYSTEMS INC</issuerName>
        <issuerTradingSymbol>ATK</issuerTradingSymbol>
  </issuer>
  <reportingOwner>
    <reportingOwnerId>
            <rptOwnerCik>0001186673</rptOwnerCik>
            <rptOwnerName>FOOTE JEFFREY O</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
      <isDirector>0</isDirector>
      <isOfficer>1</isOfficer>
      <isTenPercentOwner>0</isTenPercentOwner>
      <isOther>0</isOther>
      <officerTitle>GVP Aerospace</officerTitle>
    </reportingOwnerRelationship>
  </reportingOwner>
  <derivativeSecurity>
    <securityTitle>
      <value>Phantom Stock</value>
    </securityTitle>
    <conversionOrExercisePrice>
      <value>0</value>
      <footnoteId id="F1"/>
    </conversionOrExercisePrice>
    <transactionDate>
      <value>2003-05-21</value>
    </transactionDate>
    <transactionCoding>
      <transactionFormType>4</transactionFormType>
      <transactionCode>I</transactionCode>
      <equitySwapInvolved>0</equitySwapInvolved>
    </transactionCoding>
    <transactionTimeliness>
      <value/>
    </transactionTimeliness>
    <transactionAmounts>
      <transactionShares>
        <value>2544</value>
      </transactionShares>
      <transactionValue>
        <value>51.65</value>
      </transactionValue>
      <transactionAcquiredDisposedCode>
        <value>D</value>
      </transactionAcquiredDisposedCode>
    </transactionAmounts>
    <exerciseDate>
      <value>2003-05-21</value>
    </exerciseDate>
    <expirationDate>
      <value>1988-08-08</value>
      <footnoteId id="F2"/>
    </expirationDate>
    <underlyingSecurity>
      <underlyingSecurityTitle>
        <value>Common Stock</value>
      </underlyingSecurityTitle>
      <underlyingSecurityShares>
        <value>2544</value>
      </underlyingSecurityShares>
    </underlyingSecurity>
    <postTransactionAmounts>
      <sharesOwnedFollowingTransaction>
        <value>0</value>
      </sharesOwnedFollowingTransaction>
    </postTransactionAmounts>
    <ownershipNature>
      <directOrIndirectOwnership>
        <value>D</value>
      </directOrIndirectOwnership>
    </ownershipNature>
  </derivativeSecurity>
  <footnotes>
    <footnote id="F1">Converts to common stock 1-for-1.</footnote>
    <footnote id="F2">Actual expiration date unknown.  Due to upgrade of EDGAR, SEC Staff has designated 08/08/1988 be entered until system modification.  Shares of phantom stock are payable in cash following termination of the reporting person's employment with Issuer or such date specified by the reporting person.</footnote>
  </footnotes>
  <ownerSignature>
    <signatureName>Jeff O. Foote</signatureName>
    <signatureDate>2003-05-22</signatureDate>
  </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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