Exhibit 12.1

Alliant Techsystems Inc.

Computation of Ratio of Earnings to Fixed Charges

(Dollars in thousands)

	Fiscal Year Ended March 31,															Three Months Ended
	2010			2009			2008			2007			2006			7/4/10			7/5/09
Earnings:
Income before income taxes and noncontrolling interest	$	435,417		$	298,049		$	328,055		$	248,077		$	215,947		$	115,424		$	110,523
Plus fixed charges	88,932			98,207			113,942			102,689			121,725			20,644			23,794
Earnings	$	524,349		$	396,256		$	441,997		$	350,766		$	337,672		$	136,068		$	134,317
Fixed Charges:
Interest expense, including amortization of debt issuance costs	$	77,494		$	87,313		$	103,904		$	92,863		$	112,447		$	17,699		$	20,935
Estimated interest factor of rental expense	11,438			10,894			10,038			9,826			9,278			2,945			2,859
Fixed Charges	$	88,932		$	98,207		$	113,942		$	102,689		$	121,725		$	20,644		$	23,794
Ratio of Earnings to Fixed Charges (1)	5.90			4.03			3.88			3.42			2.77			6.59			5.64
Rent expense	71,486			68,086			62,739			61,410			57,989			18,408			17,872		**
Percent of rent expense that represents interest	16		%	16		%	16		%	16		%	16		%	16		%	16		%

(1) For purposes of calculating the ratio of earnings to fixed charges, “earnings” represents income from continuing operations before income taxes, plus fixed charges.  “Fixed charges” consist of interest expense, including amortization of debt issuance costs and that portion of rental expense considered to be a reasonable approximation of interest.

** Approximates quarterly rent expense