UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                            Washington, DC 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)      December 13, 2005
                                                -------------------------------

                      ENGINEERED SUPPORT SYSTEMS, INC.
----------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Charter)


        MISSOURI                       0-13880                  43-1313242
(State of Incorporation)        (Commission File No.)         (IRS Employer
                                                           Identification No.)


201 Evans Lane, St. Louis, Missouri                                 63121
(Address of principal executive officer)                         (Zip Code)


Registrant's telephone number including area code: (314) 553-4000



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:

[ X ] Written communications pursuant to Rule 425 under the Securities Act
      (17 CFR 230.425)

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

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

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








Item  2.02        Results of Operations and Financial Condition

                  On December 13, 2005, Engineered Support Systems, Inc.
                  issued a press release announcing its financial results
                  for the year ended October 31, 2005. A copy of that press
                  release is attached as an exhibit to this report and is
                  incorporated herein by reference.

                  The information in this Current Report on Form 8-K,
                  including the exhibit attached hereto, shall not be deemed
                  "filed" for purposes of Section 18 of the Securities
                  Exchange Act of 1934, as amended, or otherwise subject to
                  the liabilities of that section.




Item  9.01        Financial Statements and Exhibits.

                  (c) The following exhibit is filed as part of this report:

                  Exhibit Number                   Description
                  --------------                   -----------

                        99           Press Release dated December 13, 2005,
                                     issued by Engineered Support Systems, Inc.








                                 SIGNATURES

         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.

                                            ENGINEERED SUPPORT SYSTEMS, INC.



Date:   December 13, 2005             BY:  /s/  Gary C. Gerhardt
     -----------------------             -----------------------------------
                                                Gary C. Gerhardt
                                                Vice Chairman and Chief
                                                Financial Officer












                                EXHIBIT INDEX



         Exhibit Number                     Description
         --------------                     -----------

               99              Press release dated December 13, 2005, issued
                               by Engineered Support Systems, Inc.