Exhibit 3.21



                              AMENDED AND RESTATED

                            ARTICLES OF INCORPORATION

                                       OF

              GENERAL DYNAMICS ORDNANCE AND TACTICAL SYSTEMS, INC.

                           AS AMENDED JANUARY 27, 2001


                                   ARTICLE I

         The name of the Corporation shall be General Dynamics Ordnance and
Tactical Systems, Inc.

                                   ARTICLE II

         The purpose for which the Corporation is formed is to transact any or
all lawful business, not required to be specifically stated in these Articles,
for which corporations may be incorporated under the Virginia Stock Corporation
Act, as amended from time to time.

                                  ARTICLE III

         The aggregate number of shares that the Corporation shall have
authority to issue shall be 1,000 shares of Common Stock, par value $1 per share
(hereinafter called Common Stock)

                  1. No holder of shares of stock of any class of the
         Corporation shall, as such holder, have any right to subscribe for or
         purchase (a) any shares of stock of any class of the Corporation, or
         any warrants, option or other instruments that shall confer upon the
         holder thereof the right to subscribe for or purchase or receive from
         the Corporation any shares of stock of any class, whether or not such
         shares of stock, warrants, options or other instruments are issued for
         cash or services or property or by way of dividend or otherwise, or (b)
         any other security of the Corporation that shall be convertible into,
         or exchangeable for, any shares of stock of the Corporation of any
         class or classes, or to which shall be attached or appurtenant any
         warrant, option or other instrument that shall confer upon the holder
         of such security the right to subscribe for or purchase or receive from
         the Corporation any shares of its stock of any class or classes,
         whether or not such securities are issued for cash or services or
         property or by way of dividend or otherwise, other than such right, if
         any, as the Board of Directors, in its sole discretion, may from time
         to time determine. If the Board of Directors shall offer to the holders
         of shares of stock of any class of the Corporation, or any of them, any
         such shares of stock, options, warrants, instruments or other
         securities of the Corporation, such offer shall not, in any way,
         constitute a waiver or release of the right of the Board of Directors
         subsequently to dispose of other securities of the Corporation without
         offering the same to said holders.

                  2. Anything herein to the contrary notwithstanding, dividends
         upon shares of any class of stock of the Corporation shall be payable
         only out of assets legally





         available for the payment of such dividends, and the rights of the
         holders of shares of stock of the Corporation in respect of dividends
         shall at all times be subject to the power of the Board of Directors
         to determine what dividends, if any, shall be declared and paid to the
         shareholders.

                  3. Subject to the provisions hereof and except as otherwise
         provided by law, shares of stock of any class of the Corporation may be
         issued for such consideration and for such corporate purposes as the
         Board of Directors may from time to time determine.

                                   ARTICLE IV

                  The period of the duration of the Corporation is unlimited and
perpetual.

                                   ARTICLE V

                  The number of directors shall be as specified in the By-laws
of the Corporation but such number may be increased or decreased from time to
time in such manner as may be prescribed in the By-laws.

                                   ARTICLE VI

                  Except as expressly otherwise required in these Articles of
Incorporation, an amendment or restatement of these Articles requiring
shareholder approval shall be approved by a majority of the votes entitled to be
cast by each voting group that is entitled to vote on the matter, unless in
submitting an amendment of restatement to the shareholders the Board of
Directors shall require a greater vote.

                                  ARTICLE VII

                  The Board of Directors of the Corporation may, by resolution
adopted from time to time, indemnify such persons as permitted by the Virginia
Stock Corporation Act as amended from time to time. The Board of Directors of
the Corporation may, by resolution adopted from time to time, purchase and
maintain insurance on behalf of such persons as permitted by the Virginia Stock
Corporation Act as amended from time to time.


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