EXHIBIT 7

                                 FIFTH AMENDMENT

                                       TO

                      AMENDED AND RESTATED CREDIT AGREEMENT

         FIFTH AMENDMENT,  dated as of February 13, 1996 (the  "Amendment"),  to
the Amended and Restated Credit Agreement, dated as of April 12, 1995, among NAI
Technologies,  Inc., a New York corporation (the  "Borrower"),  Chemical Bank, a
New York  banking  corporation  ("Chemical"),  The Bank of New York,  a New York
banking corporation ("BNY"), and each of the other financial  institutions which
from time to time becomes  party  thereto  (together  with Chemical and BNY, the
"Banks"),  BNY, as administrative  agent (in such capacity,  the "Administrative
Agent"),  and Chemical,  as collateral agent (in such capacity,  the "Collateral
Agent").

                              W I T N E S S E T H :

         WHEREAS,  the Borrower,  the Banks,  the  Administrative  Agent and the
Collateral  Agent are  parties  to that  certain  Amended  and  Restated  Credit
Agreement,  dated as of April 12, 1995 (as amended by certain amendments,  dated
as of August 14, 1995,  October 13, 1995,  November 6, 1995 and January 5, 1996,
the "Credit Agreement");

         WHEREAS,  unless otherwise defined herein,  terms defined in the Credit
Agreement and used herein are used herein as therein defined;

         WHEREAS,  the Borrower and certain  investors  (the  "Investors")  have
entered  into  agreements  whereby the  Investors  have agreed to purchase up to
$9,300,000  of  convertible  subordinated  notes of the Borrower in exchange for
certain  consideration  pursuant to the Subscription  Agreements (as hereinafter
defined); and

         WHEREAS,  the  Borrower  has  requested  and the Banks  have  agreed to
consent to (i) the  incurrence of such  subordinated  indebtedness  and (ii) the
extension of the Maturity Date on the terms hereinafter set forth.

         Accordingly, the parties hereto hereby agree as follows:

         SECTION 1. AMENDMENT TO ARTICLE I. Article I of the Credit Agreement is
hereby  amended  (a) by adding  the  following  defined  terms to  Section  1.01
thereof:

         "Consolidated  Interest  Expense" shall mean, for any period,  Interest
         Expense net of interest income of the Borrower and its Subsidiaries for
         such period,  determined on a  consolidated  basis in  accordance  with
         GAAP.

         "Consolidated Net Income" shall mean, for any period,  the consolidated
         Net Income (or deficit) of the Borrower and its  Subsidiaries  for such
         period (taken as a cumulative  whole),  determined  in accordance  with
         GAAP.








         "Consolidated  Net Worth" shall mean,  with respect to the Borrower and
         its Subsidiaries on a consolidated basis, as of any date, the amount of
         common  stockholders'  equity shown on a consolidated  balance sheet of
         the  Borrower  and its  Subsidiaries  as of such  date  (determined  in
         accordance  with  GAAP);  provided  that for  purposes  of  calculating
         Consolidated   Net  Worth,   deficits   shall  not  be  deducted   from
         Consolidated Net Income when calculating such amount.

         "Interest  Coverage  Ratio" shall mean, as to any period,  the ratio of
         (x) the sum of (i)  Consolidated  Net  Income  for  such  period,  (ii)
         Consolidated Interest Expense for such period, (iii) federal, state and
         local  income  taxes   deducted  from  revenue  in   determining   such
         Consolidated Net Income and (iv)  amortization of deferred debt expense
         to (y) Consolidated Interest Expense for such period.

         "Investors"  shall mean Charles S. Holmes and such other  investors who
         purchase Subordinated Notes pursuant to the Subscription Agreements.

         "Net Income"  shall mean,  with respect to the Borrower for any period,
         net income computed in accordance with GAAP.

         "Registration Rights Agreement" shall mean one or more of those certain
         Registration  Rights  Agreements to be entered into by the Borrower and
         the  Investors  which  agreements  shall  be in the form of  Exhibit  C
         hereto.

         "Shelf   Registration   Agreement"   shall  mean  that  certain   Shelf
         Registration  Agreement  to be  entered  into by the  Borrower  and the
         Banks,  which agreement shall provide for the registration of shares of
         capital stock  previously  issued to the Banks and shall be in form and
         substance satisfactory to the Banks.

         "Subordinated Indebtedness" shall mean the Indebtedness incurred by the
         Borrower evidenced by the Subordinated Notes.

         "Subordinated  Notes" shall mean those  certain notes to be executed by
         the  Borrower  in favor of the  Investors  in the  aggregate  principal
         amount of up to $9,300,000, which notes shall be in the form of Exhibit
         B hereto.

         "Subscription  Agreements"  shall  mean  one or more of  those  certain
         Subscription  Agreements  to be entered  into by the  Borrower  and the
         Investors,   in  connection  with  the  issuance  of  the  Subordinated
         Indebtedness.

(b) by amending the definitions of "Consolidated  Current Ratio",  "Consolidated
Quick Ratio" and "Maturity Date" in their entirety as follows:

         "Consolidated  Current  Ratio"  shall  mean the ratio of (x) the sum of
         consolidated  current assets of the Borrower and its Subsidiaries  plus
         an amount equal to the difference between

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         the Total  Commitment in effect on the date of such  determination  and
         the aggregate  principal amount  outstanding in respect of the Loans as
         of such  date,  in each case after  giving  effect to any  payments  of
         principal made, and the concurrent  reduction of the Total  Commitment,
         on such date  pursuant  to  Section  2.08  hereof  to (y)  consolidated
         current  liabilities  of  the  Borrower  and  its  Subsidiaries,   each
         determined by reference to the consolidated financial statements of the
         Borrower and its Subsidiaries provided pursuant to Section 5.01 hereof.

         "Consolidated  Quick  Ratio"  shall  mean  the  ratio of (x) the sum of
         Consolidated  Quick  Assets  plus an  amount  equal  to the  difference
         between   the  Total   Commitment   in  effect  on  the  date  of  such
         determination and the aggregate principal amount outstanding in respect
         of the Loans as of such date,  in each case after giving  effect to any
         payments of principal  made, and the concurrent  reduction of the Total
         Commitment,  on such  date  pursuant  to  Section  2.08  hereof  to (y)
         consolidated  current liabilities of the Borrower and its Subsidiaries,
         determined by reference to the consolidated financial statements of the
         Borrower and its Subsidiaries provided pursuant to Section 5.01 hereof.

         "Maturity Date" shall mean January 15, 1999.

and (c) by deleting the definitions  "Extended  Maturity Date" and "Consolidated
Tangible Net Worth" in their entirety.

         SECTION 2. AMENDMENTS TO ARTICLE II. Article II of the Credit Agreement
is hereby  amended by (a)  amending  Section  2.08(b) in its entirety to read as
follows:

     (b) The Borrower shall make the following  scheduled  payments of the Loans
     in the  principal  amount of (i) $500,000 on the last  Business Day of each
     quarter  commencing on March 31, 1996 and ending on December 31, 1996, (ii)
     $750,000 on the last  Business Day of each quarter  commencing on March 31,
     1997 and ending on December  31, 1998 and (iii)  $7,175,000,  or such other
     principal  amount of the Loans which may be  outstanding,  on the  Maturity
     Date.

and (b) amending Section 2.08(c) in its entirety to read as
follows:

     (c) Upon (x) any sale or series of related  sales  within any twelve  month
     period of assets by the  Borrower  or any of its  Subsidiaries  (other than
     sales of  inventory  in the  ordinary  course  of  business  or the sale of
     equipment which is uneconomic, obsolete or no longer

                                        3







     useful and which, in the latter instance,  does not have an aggregate value
     in excess of $50,000)  in which the amount of sale  proceeds  generated  by
     such sale or series of  related  sales of assets  exceeds  $100,000  in the
     aggregate,  and (y) the sale of the Hauppauge Property,  the Borrower shall
     prepay the Loans in an amount equal to 100% of such sale  proceeds  (net of
     reasonable costs in connection  therewith) PROVIDED that in connection with
     the sale or sales  described  in clause  (x), no such  prepayment  shall be
     required to the extent such sale  proceeds  are  promptly  used to purchase
     replacement assets for those sold.

         SECTION 3. AMENDMENT TO ARTICLE V. Article V of the Credit Agreement is
hereby amended by amending Section 5.07 in its entirety to read as follows:

          SECTION  5.07.  MAINTENANCE  OF  ACCOUNTS.  Maintain  or  cause  to be
     maintained  at  all  times  all  operating   accounts  and  other  accounts
     (including without limitation accounts for the deposit of proceeds of sales
     of assets) with the Collateral Agent.

         SECTION 4. AMENDMENTS TO ARTICLE VI. Article VI of the Credit Agreement
is hereby amended (a) by amending  Section  6.03(vi)  thereof in its entirety to
read as follows:

     (vi)  Subordinated  Indebtedness  of the  Borrower to the  Investors  in an
     aggregate  amount not to exceed  $9,300,000,  which  Indebtedness  shall be
     subordinate in right of payment to the Indebtedness owed to the Banks under
     this Agreement on terms satisfactory to the Bank.

and (b) by  amending  Sections  6.04 and  Sections  6.14  through  6.17 in their
entirety to read as follows:

          SECTION  6.04.  CAPITAL  EXPENDITURES.  Make or commit to make Capital
     Expenditures  for any fiscal  year in an  aggregate  amount in excess of $2
     million.

          SECTION 6.14.  MAINTENANCE OF CONSOLIDATED  CURRENT RATIO.  Permit the
     Consolidated  Current Ratio at the end of any fiscal quarter for the fiscal
     years set forth  below to fall  below the ratios  set forth  opposite  such
     fiscal years:


          Date                                        Ratio
          ----                                        -----
                                                 
          1996                                        1.30 to 1.0
          1997                                        1.50 to 1.0
          1998                                        1.75 to 1.0



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         SECTION  6.15.  MAINTENANCE  OF  CONSOLIDATED  QUICK RATIO.  Permit the
Consolidated  Quick Ratio at the end of any fiscal  quarter for the fiscal years
set forth below to fall below the ratios set forth opposite such fiscal years:



          Date                                        Ratio
          ----                                        -----
                                                  
          1996                                        0.55 to 1.0
          1997                                        0.75 to 1.0
          1998                                        1.00 to 1.0


         SECTION  6.16.   MAINTENANCE   OF   CONSOLIDATED   NET  WORTH.   Permit
Consolidated  Net Worth for the following  periods to fall below the amounts set
forth opposite such periods at any time during such periods:




                  Period                                               Amount
                                                                   
                  February 13 through                                   $7,500,000
                    December 30, 1996

                  December 31, 1996 through                             $7,500,000 plus
                    December 30, 1997                                    an amount equal to

                                                                         50% of Consolidated
                                                                         Net Income for
                                                                         fiscal year 1996

                  December 31, 1997 through                             $7,500,000 plus
                    December 30, 1998                                    an amount equal

                                                                         to the sum of
                                                                         50% of Consolidated
                                                                         Net Income for
                                                                         fiscal years 1996
                                                                         and 1997 in the
                                                                         aggregate

                  December 31, 1998 through                             $7,500,000 plus
                    Maturity Date                                        an amount equal

                                                                         to the sum of
                                                                         50% of Consolidated
                                                                         Net Income for
                                                                         fiscal years 1996,
                                                                         1997 and 1998 in
                                                                         the aggregate


         SECTION  6.17.  MAINTENANCE  OF  INTEREST  COVERAGE  RATIO.  Permit the
Interest  Coverage  Ratio at each date set forth  below,  for the period of four
fiscal quarters ending on such date, to fall below the ratios set forth opposite
such dates:



          Date                                                 Ratio
                                                            
          December 31, 1996                                    1.00 to 1
          March 31, 1997                                       1.25 to 1


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          June 30, 1997 and thereafter                         1.50 to 1



         SECTION 5. EXHIBITS.  Exhibits A-1 and A-2 are hereby replaced in their
entirety by Exhibit A hereto.

         SECTION 6.  CONFIRMATION  OF LIENS.  The Borrower hereby confirms that,
pursuant to the terms of the Credit  Agreement and the Security  Documents,  the
Borrower and the  Guarantors  have  granted  Liens on all of their assets to the
Collateral  Agent for the  benefit of the Banks.  The  Borrower  hereby  further
confirms that it will not and will not permit its Subsidiaries to incur, create,
assume or suffer to exist any Lien on any property or assets,  income or profits
of the Borrower or any of its Subsidiaries other than those permitted by Section
6.01 of the Credit Agreement, and any such granting of any such Lien in favor of
any third person,  including the holders of the  Subordinated  Indebtedness  (as
hereinafter  defined)  shall  constitute  an Event of  Default  under the Credit
Agreement.  Nothing  contained herein shall constitute a release or modification
of any Lien in favor of the  Collateral  Agent and the  Banks in any  Collateral
which constitutes security for any of the Obligations.

         SECTION 7.  COUNTERPARTS.  This Amendment may be executed in any number
of  counterparts,  each of which shall  constitute  an original and all of which
when taken together shall constitute one and the same instrument.

         SECTION 8.  CONDITIONS TO  EFFECTIVENESS.  This Amendment  shall become
effective as of the date hereof (the "Effective Date") when all of the following
shall have occurred:

          (a) The Banks shall have each received counterparts of this Amendment,
     duly executed by the Borrower;

          (b) The Borrower  shall have executed and  delivered  amended Notes to
     each of the Banks, in substantially the form of Exhibit A hereto;

          (c)  The  Borrower  shall  have  received  an  amount  not  less  than
     $6,800,000  in cash  representing  the net proceeds  received in respect of
     Subordinated Indebtedness;

          (d) The  Banks  shall  have  received  copies  of the  fully  executed
     Subordinated Notes;

          (e) The Banks  shall  have  received  a copies  of the fully  executed
     Subscription Agreements and the Registration Rights Agreements;

          (f) The Banks  shall have  received a fully  executed  copy of a Shelf
     Registration Agreement, in substantially the form of Exhibit D hereto;

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          (g) The Banks shall have  received the  favorable  written  opinion of
     Whitman Breed Abbott & Morgan, counsel to the Borrower, dated the Effective
     Date, in substantially the form of Exhibit E hereto;

          (h) The  Borrower  shall be in  compliance  with all of the  terms and
     provisions  set forth in the Credit  Agreement to be observed and performed
     and,  after giving effect to this  Amendment,  no Event of Default or event
     which  upon  notice or lapse of time or both would  constitute  an Event of
     Default shall have occurred and be continuing;

          (i) All representations  and warranties  contained in Section 3 of the
     Credit  Agreement and the other Loan Documents shall be true and correct in
     all material respects on and as of the Effective Date, except to the extent
     that such  representations  and warranties  expressly  relate to an earlier
     date;

          (j) The Banks  shall have  received  the  projected  and  consolidated
     income and loss statements,  budgets and cash flow statements on a monthly,
     quarterly and annual basis for the period  through and  including  December
     31, 1998,  which shall be in form and substance  satisfactory to the Banks;
     and

          (k) The  Collateral  Agent shall  confirm in writing  that the Lockbox
     Agreement shall be terminated upon the occurrence of the Effective Date.

         SECTION 9.  RATIFICATION.  Except to the  extent  hereby  amended,  the
Credit  Agreement  remains in full force and effect and is hereby  ratified  and
affirmed.  References in the Loan Documents to the Credit  Agreement  shall mean
such document as amended by this Amendment,  as the same may be further amended,
supplemented or otherwise modified from time to time.

         SECTION 10. COSTS AND EXPENSES.  All out-of-pocket expenses incurred by
the Banks,  including the reasonable fees and  disbursements of Zalkin,  Rodin &
Goodman  LLP,  special  counsel  for the  Agents  and  the  Banks,  incurred  in
connection  with the negotiation and preparation of this Amendment shall be paid
by the  Borrower as provided in  Subsection  9.05 of the Credit  Agreement.  The
Borrower  hereby  confirms that the Borrower shall be obligated to reimburse the
Banks'  reasonable  expenses incurred in the retention of a financial advisor to
the Banks in connection with the  administration  of the Loans or the protection
or enforcement of the Banks' rights in connection therewith.

         SECTION 11.  REFERENCES.  This Amendment shall be limited  precisely as
written and shall not be deemed (a) to be a consent

                                        7







granted pursuant to, or a waiver or modification of, any other term or condition
of the Credit  Agreement or any of the  instruments  or  agreements  referred to
therein or (b) to prejudice any right or rights which the Administrative  Agent,
Collateral  Agent or the  Banks may now have or have in the  future  under or in
connection  with  the  Credit  Agreement  or the  Loan  Documents  or any of the
instruments or agreements referred to therein.

         SECTION 12.  APPLICABLE  LAW. THIS  AMENDMENT  SHALL IN ALL RESPECTS BE
CONSTRUED IN  ACCORDANCE  WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK
APPLICABLE TO CONTRACTS MADE AND TO BE PERFORMED WHOLLY WITHIN SUCH STATE.

         SECTION 13.  HEADINGS.  Section headings in this Amendment are included
herein for convenience of reference only and are not to affect the  construction
of, or to be taken into consideration in interpreting, this Amendment.

         SECTION 14. INTEGRATION. This Amendment represents the entire agreement
of the parties hereto with respect to the amendment of the Credit  Agreement and
the terms of any letters and other documentation entered into among the Borrower
and any Bank or the  Administrative  Agent or the Collateral  Agent prior to the
execution  of  this  Amendment  which  relate  to the  amendment  of the  Credit
Agreement shall be replaced by the terms of this Amendment.

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly  executed  and  delivered  in New York,  New York by their  proper and duly
authorized officers as of the day and year first above written.

                                      NAI TECHNOLOGIES, INC.

                                      By: /s/ Richard A. Schneider
                                         _______________________________
                                         Title: Executive Vice President

                                      THE BANK OF NEW YORK
                                      AS ADMINISTRATIVE AGENT AND AS A BANK

                                      By: /s/ Richard Maybaum
                                         ______________________________
                                         Vice President

                                      CHEMICAL BANK
                                      AS COLLATERAL AGENT AND AS A BANK

                                      By: /s/ Kathy A. Duncan
                                         ______________________________
                                         Vice President

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Consented to as of this
13th day of February, 1996

NAI TECHNOLOGIES - SYSTEMS DIVISION CORPORATION

By: /s/ Richard A. Schneider
   _________________________
   Title: Secretary

WILCOM, INC.

By: /s/ Richard A. Schneider
   _________________________
   Title: Secretary

ARATHON, V.I., INC.

By: /s/ Richard A. Schneider
   _________________________
   Title: Secretary

CODAR TECHNOLOGY, INC.

By: /s/ Richard A. Schneider
   _________________________
   Title: Secretary

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