<PAGE>


                          FOURTH SUPPLEMENTAL INDENTURE

         FOURTH SUPPLEMENTAL INDENTURE, dated as of March 24, 2004 (the "FOURTH
SUPPLEMENTAL INDENTURE"), among Armor Holdings, Inc., a Delaware corporation
(the "COMPANY"), the subsidiary guarantors listed as signatories to the
Indenture as defined below (collectively, the "INITIAL SUBSIDIARY GUARANTORS"),
the subsidiary guarantors listed on Exhibit A attached hereto (the "NEW
SUBSIDIARY GUARANTORS"), ODV Holdings Corp., a Delaware corporation ("ODV"), and
Wachovia Bank, National Association, a national banking association, as trustee
(the "TRUSTEE").

                                   WITNESSETH

         WHEREAS, the Company has issued its 8 1/4% Senior Subordinated Notes
due 2013 (the "NOTES") in the aggregate principal amount of $150,000,000 under
and pursuant to the Indenture dated August 12, 2003, among the Company, the
Initial Subsidiary Guarantors and the Trustee (the "INDENTURE");

         WHEREAS, pursuant to the terms of the Indenture, the Indenture has been
supplemented by the First Supplemental Indenture, dated as of September 30, 2003
(the "FIRST SUPPLEMENTAL INDENTURE"), among the Company, the Initial Subsidiary
Guarantors, the Discontinued Domestic Subsidiaries listed in Schedule I to the
First Supplemental Indenture and the Trustee; the Second Supplemental Indenture,
dated as of December 9, 2003 (the "SECOND SUPPLEMENTAL INDENTURE"), among the
Company, the Initial Subsidiary Guarantors, certain of the Discontinued Domestic
Subsidiaries, AHI Bulletproof Acquisition Corp., an Arizona corporation, AHI
Bulletproof Acquisition Corp., a Delaware corporation, the subsidiary guarantors
listed on Exhibit A attached thereto and the Trustee; and the Third Supplemental
Indenture, dated as of December 24, 2003 (the "THIRD SUPPLEMENTAL INDENTURE"),
among the Company, the Initial Subsidiary Guarantors, Hatch Imports, Inc., a
California corporation, the subsidiary guarantors listed on Exhibit A attached
thereto and the Trustee, pursuant to which certain subsidiaries of the Company
became Subsidiary Guarantors;

         WHEREAS, pursuant to Section 4.20(C) of the Indenture, the Company and
the Trustee entered into a Release dated as of November 26, 2003 under which
certain of the Discontinued Domestic Subsidiaries were released and discharged
from their Subsidiary Guarantees and their obligations under the Indenture and
the Registration Rights Agreement;

         WHEREAS, pursuant to Section 4.22 of the Indenture, the Company is
required to cause ODV to execute and deliver to the Trustee this Fourth
Supplemental Indenture pursuant to which ODV shall become bound by the
provisions of the Indenture and the Registration Rights Agreement as a
Subsidiary Guarantor;

         WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is
authorized to execute and deliver this Fourth Supplemental Indenture;

<PAGE>

         WHEREAS, all things necessary for the execution of this Fourth
Supplemental Indenture and to make this Fourth Supplemental Indenture a valid
and binding agreement of the parties hereto have been done.

         NOW, THEREFORE, for and in consideration of the foregoing and for other
good and valuable consideration, the receipt of which is hereby acknowledged by
the Company, the Initial Subsidiary Guarantors, the New Subsidiary Guarantors,
ODV and the Trustee, such parties hereby agree for the benefit of each other and
the equal and ratable benefit of the Holders of the Notes as follows:

                  Section 1.        Definitions.

                  Unless otherwise stated or unless the context shall otherwise
require, all capitalized terms used in this Fourth Supplemental Indenture shall
be given the same meanings as such terms are defined in the Indenture, the First
Supplemental Indenture or the Second Supplemental Indenture, as the case may be.

                  Section 2.        Subsidiary Guarantee.

                  (a) By execution and delivery of this Fourth Supplemental
Indenture, ODV hereby agrees to become a Subsidiary Guarantor pursuant to the
Indenture and to assume all obligations of the Subsidiary Guarantors under the
Indenture (including without limitation, the Subsidiary Guarantee as defined in
the Indenture), the Notes and the Registration Rights Agreement, in each case,
in accordance with the terms thereof.

                  (b) ODV hereby agrees that its execution and delivery of this
Fourth Supplemental Indenture shall evidence its Subsidiary Guarantee as set
forth in Section 11.01 of the Indenture without the need for any further
notation on the Notes and the delivery and authentication of any Note by the
Trustee under the Indenture, including any Note authenticated and delivered on
or prior to the date of this Fourth Supplemental Indenture, shall constitute due
delivery of the Subsidiary Guarantee set forth in this Fourth Supplemental
Indenture on behalf of ODV. Each of the Initial Subsidiary Guarantors and the
New Subsidiary Guarantors hereby agrees that its Subsidiary Guarantee set forth
in Section 11.01 of the Indenture shall remain in full force and effect.

                  Section 3.        Effectiveness and Validity.

                  (a) This Fourth Supplemental Indenture shall become effective
on the date first written above. The Indenture, as supplemented by the First
Supplemental Indenture, the Second Supplemental Indenture and this Fourth
Supplemental Indenture, are in all respects ratified and confirmed hereby.
Following the effectiveness hereof, the Indenture, the First Supplemental
Indenture and the Second Supplemental Indenture shall be deemed supplemented in
accordance herewith, and this Fourth Supplemental Indenture shall form a part of
the Indenture as supplemented by the First Supplemental Indenture and the Second
Supplemental Indenture for all purposes, and every Holder of Notes heretofore or
hereafter authenticated and delivered under the Indenture as supplemented by the
First Supplemental Indenture and the Second Supplemental Indenture shall be
entitled to the benefit thereof and hereof and be bound thereby and hereby.

                                       2
<PAGE>

                  (b) If an Officer of a Subsidiary Guarantor whose signature is
on the Indenture, the First Supplemental Indenture, the Second Supplemental
Indenture or this Fourth Supplemental Indenture no longer holds that office at
the time the Trustee authenticates such Notes or at any time thereafter, such
Subsidiary Guarantor's Subsidiary Guarantee shall be valid nevertheless.

                  Section 4.        Solvency; No Fraudulent Transfer or
Conveyance.

                  ODV, for the benefit of each Holder, confirms that it is a
solvent corporation and that the granting of the Subsidiary Guarantee is not
made with the purpose of defrauding any of its current creditors. Each of the
Company, the Initial Subsidiary Guarantors, the New Subsidiary Guarantors and
ODV confirms that the Subsidiary Guarantee given by ODV does not constitute a
fraudulent transfer or conveyance for purposes of the United States Bankruptcy
Code, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act
or any similar Federal or state law.

                  Section 5.        No Personal Liability of Directors,
Officers, Employees and Stockholders.

                  No director, officer, employee, incorporator or stockholder of
the Company or any Subsidiary Guarantor, as such, shall have any liability for
any obligations of the Company or the Subsidiary Guarantors under the Notes, the
Indenture, the First Supplemental Indenture, the Second Supplemental Indenture,
this Fourth Supplemental Indenture, the Subsidiary Guarantees, the Registration
Rights Agreement or for any claim based on, in respect of, or by reason of, such
obligations or their creation. The acceptance of a Note by each Holder of Notes
is deemed to be a waiver and release of all such liability. This waiver and
release are part of the consideration for issuance of the Subsidiary Guarantee
set forth in and evidenced by this Fourth Supplemental Indenture.

                  Section 6.        Governing Law.

                  THIS FOURTH SUPPLEMENTAL INDENTURE AND THE NOTES AND THE
SUBSDIARY GUARANTEE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO ITS CONFLICTS OF LAW
PRINCIPLES.

                  Section 7.        Successors.

                  All agreements of the Company and the Subsidiary Guarantors in
the Indenture, the First Supplemental Indenture, the Second Supplemental
Indenture, this Fourth Supplemental Indenture and the Notes shall bind their
respective successors. All agreements of the Trustee in this Fourth Supplemental
Indenture shall bind its successors.

                  Section 8.        Duplicate Originals.

                  The parties may sign any number of copies of this Fourth
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same instrument.

                                       3
<PAGE>

                  Section 9.        Severability.

                  In case any provision in this Fourth Supplemental Indenture
shall be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions of the Indenture, the First
Supplemental Indenture, the Second Supplemental Indenture, this Fourth
Supplemental Indenture and the Notes shall not in any way be affected or
impaired thereby, and a Holder shall have no claim therefor against any party
hereto.

                  Section 10.       Headings.

                  The headings of the sections of this Fourth Supplemental
Indenture have been inserted for convenience of reference only, are not to be
considered a part of this Fourth Supplemental Indenture and will in no way
modify or restrict any of the terms or provisions hereof.

                  Section 11.       Trustee.

                  The Trustee makes no representations as to the validity or
sufficiency of this Fourth Supplemental Indenture. The recitals and statements
herein are deemed to be those of the Company and the Subsidiary Guarantors and
not of the Trustee.

                                       4

<PAGE>

                                   SIGNATURES

                  IN WITNESS WHEREOF, the parties hereto have caused this Fourth
Supplemental Indenture to be duly executed as of the date first written above.

                                ARMOR HOLDINGS, INC.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Corporate Controller and Treasurer


<PAGE>


                                WACHOVIA BANK, NATIONAL
                                ASSOCIATION,
                                  as Trustee



                                By: /s/ Stephanie Moore
                                   ---------------------------------------------
                                   Name:  Stephanie Moore
                                   Title: Trust Officer


<PAGE>


                                911EP, INC.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                AHI PROPERTIES I, INC.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                ARMOR BRANDS, INC.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                ARMOR HOLDINGS FORENSICS, L.L.C..,
                                  a Delaware limited liability company



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary


<PAGE>


                                ARMOR HOLDINGS GP, LLC,
                                  a Delaware limited liability company



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                ARMOR HOLDINGS LP, LLC,
                                  a Delaware limited liability company



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary



                                ARMOR HOLDINGS MOBILE SECURITY, L.L.C.,
                                  a Delaware limited liability company



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary



                                ARMOR HOLDINGS PAYROLL SERVICES, LLC,
                                  a Delaware limited liability company



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary


<PAGE>


                               ARMOR HOLDINGS PRODUCTS, L.L.C.,
                                 a Delaware limited liability company



                                By: /s/ Phil Baratelli
                                  ---------------------------------------------
                                  Name:  Phil Baratelli
                                  Title: Vice President and Assistant Secretary




                               ARMOR HOLDINGS PROPERTIES, INC.,
                                 a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                               ARMOR SAFETY PRODUCTS COMPANY,
                                 a Delaware corporation



                                By: /s/ Phil Baratelli
                                  ---------------------------------------------
                                  Name:  Phil Baratelli
                                  Title: Vice President and Assistant Secretary




                               B-SQUARE, INC.,
                                 a Texas corporation



                                By: /s/ Phil Baratelli
                                  ---------------------------------------------
                                  Name:  Phil Baratelli
                                  Title: Vice President and Assistant Secretary

<PAGE>


                                BREAK-FREE ARMOR CORP.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                BREAK-FREE, INC.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary



                                CASCO INTERNATIONAL, INC.,
                                  a New Hampshire corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                DEFENSE TECHNOLOGY CORPORATION OF AMERICA,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary


<PAGE>


                                IDENTICATOR, INC.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                MONADNOCK LIFETIME PRODUCTS, INC.,
                                  a Delaware corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                MONADNOCK LIFETIME PRODUCTS, INC.,
                                  a New Hampshire corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                                MONADNOCK POLICE TRAINING COUNCIL, INC.,
                                  a New Hampshire corporation



                                By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary

<PAGE>


                              NAP PROPERTIES, LTD.,
                                a California limited partnership

                              By:  NAP PROPERTY MANAGERS LLC,
                                   its General Partner

                              By:  ARMOR HOLDINGS PROPERTIES, INC.,
                                   its Managing Member



                              By: /s/ Phil Baratelli
                                 ---------------------------------------------
                                 Name:  Phil Baratelli
                                 Title: Vice President and Assistant Secretary



                              NAP PROPERTY MANAGERS LLC,
                                a California company

                              By:  ARMOR HOLDINGS PROPERTIES, INC.,
                                   its Managing Member


                              By: /s/ Phil Baratelli
                                 ---------------------------------------------
                                 Name:  Phil Baratelli
                                Title: Vice President and Assistant Secretary




                              O'GARA-HESS & EISENHARDT ARMORING COMPANY, L.L.C.,
                                 a Delaware limited liability company


                              By: /s/ Phil Baratelli
                                 ---------------------------------------------
                                 Name:  Phil Baratelli
                                 Title: Vice President and Assistant Secretary


<PAGE>


                               PRO-TECH ARMORED PRODUCTS OF MASSACHUSETTS, INC.,
                                 a Massachusetts corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary



                               RAMTECH DEVELOPMENT CORP.,
                                 a Delaware corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary



                               SAFARI LAND LTD, INC.,
                                 a California corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                               SAFARILAND GOVERNMENT SALES, INC.,
                                 a California corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary

<PAGE>


                               SPEEDFEED ACQUISITION CORP.,
                                 a Delaware corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                               THE O'GARA COMPANY,
                                 an Ohio corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                               ARMORGROUP SERVICES, LLC,
                                 a Delaware limited liability company



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                               CDR INTERNATIONAL, INC.,
                                 a Delaware corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary


<PAGE>


                               NETWORK AUDIT SYSTEMS, INC.,
                                 a Delaware corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                               NEW TECHNOLOGIES ARMOR, INC.,
                                 a Delaware corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name:  Phil Baratelli
                                   Title: Vice President and Assistant Secretary




                               AHI BULLETPROOF ACQUISITION CORP.,
                                 a Delaware corporation


                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               SIMULA, INC.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary



<PAGE>



                               SIMULA AEROSPACE & DEFENSE
                               GROUP, INC.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               INTERNATIONAL CENTER FOR SAFETY
                               EDUCATION, INC.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               SIMULA POLYMERS SYSTEMS, INC.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary


<PAGE>


                               SIMULA TECHNOLOGIES, INC.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               AI CAPITAL CORP.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               SIMULA TRANSPORTATION EQUIPMENT
                               CORPORATION,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               CCEC CAPITAL CORP.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary


<PAGE>


                               SAI CAPITAL CORP.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               ASD CAPITAL CORP.,
                                 an Arizona corporation



                               By: /s/ Glenn Heiar
                                   ---------------------------------------------
                                   Name:    Glenn Heiar
                                   Title:   Chief Financial Officer, Treasurer
                                            and Secretary




                               HATCH IMPORTS, INC.
                                 a California corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name: Phil Baratelli
                                   Title: Vice President and Secretary




                                ODV HOLDINGS CORP.
                                  a Delaware corporation



                               By: /s/ Phil Baratelli
                                   ---------------------------------------------
                                   Name: Phil Baratelli
                                   Title: Vice President and Secretary



<PAGE>


                                    EXHIBIT A

AHI Bulletproof Acquisition Corp., a Delaware corporation
ArmorGroup Services, LLC, a Delaware limited liability company
CDR International, Inc., a Delaware corporation
Network Audit Systems, Inc., a Delaware corporation
New Technologies Armor, Inc., a Delaware corporation
Simula, Inc., an Arizona corporation
Simula Aerospace & Defense Group, Inc., an Arizona corporation
International Center for Safety Education, Inc., an Arizona corporation
Simula Polymers Systems, Inc., an Arizona corporation
Simula Technologies, Inc., an Arizona corporation
AI Capital Corp., an Arizona corporation
Simula Transportation Equipment Corporation, an Arizona corporation
CCEC Capital Corp., an Arizona corporation
SAI Capital Corp., an Arizona corporation
ASD Capital Corp., an Arizona corporation
Hatch Imports, Inc., a California corporation