Document:

<PAGE>

                                                                     Exhibit 4.1
NUMBER                                                               UNITS

U-

SEE REVERSE FOR
CERTAIN DEFINITIONS

                        ALPHA SECURITY GROUP CORPORATION

                                                            CUSIP ______________

                               UNITS CONSISTING OF
                          ONE SHARE OF COMMON STOCK AND
                ONE WARRANT TO PURCHASE ONE SHARE OF COMMON STOCK

THIS CERTIFIES THAT                                  is the owner of

                                                                          Units.

Each Unit (collectively, the "Units") consists of one (1) share of common stock,
par value $.0001 per share ("Common Stock"), of Alpha Security Group
Corporation, a Delaware corporation (the "Company"), and one warrant
(collectively, the "Warrants"). Each Warrant entitles the holder to purchase one
(1) share of Common Stock for $8.00 per share (subject to adjustment). Each
Warrant will become exercisable on the later of (i)            , 2007 or (ii)
the earlier of the Company's completion of a merger, capital stock exchange,
asset acquisition or other similar business combination or the distribution of
funds held by that certain trust account for the benefit of the Company's public
stockholders, and will expire unless exercised before 5:00 p.m., New York City
Time, on               , 2010, or earlier upon redemption (the "Expiration
Date"). The Common Stock and Warrants comprising the Units represented by this
certificate are not transferable separately prior to            , 2006, subject
to earlier separation in the discretion of Maxim Group LLC; provided, however,
that in no event will Maxim Group LLC allow separate trading of the common stock
and warrants until the Company files am audited balance sheet reflecting the
Company's receipt of the gross proceeds of its initial public offering. The
terms of the Warrants are governed by a Warrant Agreement, dated as
of            , 2006, between the Company and American Stock Transfer & Trust
Company, as Warrant Agent, and are subject to the terms and provisions contained
therein, all of which terms and provisions the holder of this certificate
consents to by acceptance hereof. Copies of the Warrant Agreement are on file at
the office of the Warrant Agent at 59 Maiden Lane, Plaza Level, New York, New
York 10038, and are available to any Warrant holder on written request and
without cost.

This certificate is not valid unless countersigned by the Transfer Agent and
Registrar of the Company.

Witness the facsimile seal of the Company and the facsimile signature of its
duly authorized officers.

By                    Alpha Security Group Corporation

                                    CORPORATE
_____________________                DELAWARE               ___________________
Steven M. Wasserman,                  SEAL                  Steven M. Wasserman,
Chief Executive                                             Secretary
Officer and President                 2005

<PAGE>

                        Alpha Security Group Corporation

The Company will furnish without charge to each stockholder who so requests, a
statement of the powers, designations, preferences and relative, participating,
optional or other special rights of each class of stock or series thereof of the
Company and the qualifications, limitations, or restrictions of such preferences
and/or rights.

The following abbreviations, when used in the inscription on the face of this
certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:
<TABLE>
-----------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>                                                  <C>
TEN COM -            as tenants in common                                 UNIF GIFT MIN ACT - Custodian

TEN ENT -            as tenants by the entireties                         (Cust)                  (Minor)
JT TEN -             as joint tenants with right of survivorship          under Uniform Gifts to Minors Act
                     and not as tenants in common

                                                                          -----------------
                                                                          (State)
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

Additional Abbreviations may also be used though not in the above list.

For value received,                        hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

--------------------------------------------------------------------------------
(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

_________________________________________________________________________ Units

represented by the within Certificate, and do hereby irrevocably constitute and
appoint

                                                        Attorney to transfer the
said Units on the books of the within named Company will full power of
substitution in the premises.

Dated ____________

                                    --------------------------------------------
                                    NOTICE: The signature to this assignment
                                            must correspond with the name as
                                            written upon the face of the
                                            certificate in every particular,
                                            without alteration or enlargement
                                            or any change whatever.
Signature(s) Guaranteed:

--------------------------------------
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO
S.E.C. RULE 17Ad-15).<PAGE>

                                                                     Exhibit 4.2

 NUMBER                                                   SHARES

[SYMBOL]

                        ALPHA SECURITY GROUP CORPORATION

              INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                  COMMON STOCK

                                                                 SEE REVERSE FOR
                                                             CERTAIN DEFINITIONS

 THIS CERTIFIES THAT                                     CUSIP _________________

 IS THE OWNER OF

            FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF
                       $.0001 EACH OF THE COMMON STOCK OF

                        ALPHA SECURITY GROUP CORPORATION

  transferable on the books of the Corporation in person or by duly authorized
attorney upon surrender of this certificate properly endorsed. This certificate
 is not valid unless countersigned by the Transfer Agent and registered by the
 Registrar. Witness the seal of the Corporation and the facsimile signatures of
                         its duly authorized officers.

 Dated:               ALPHA SECURITY GROUP CORPORATION
                                 CORPORATE
                                    SEAL
                                    2005

 ------------------------------------------       ------------------------------
 Steven M. Wasserman, Co-Chairman and Chief       Steven M. Wasserman, Secretary
 Executive Officer
                                    DELAWARE

<PAGE>

The following abbreviations, when used in the inscription on the face of this
certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common       UNIF GIFT MIN ACT     Custodian
TEN ENT - as tenants by the entireties           (Cust)                (Minor)
JT TEN -  as joint tenants with right          under Uniform Gifts to Minors Act
          of survivorship and not as
          tenants in common                                (State)

    Additional Abbreviations may also be used though not in the above list.

                        ALPHA SECURITY GROUP CORPORATION

The Corporation will furnish without charge to each stockholder who so requests
the powers, designations, preferences and relative, participating, optional or
other special rights of each class of stock or series thereof of the Corporation
and the qualifications, limitations, or restrictions of such preferences and/or
rights. This certificate and the shares represented thereby are issued and shall
be held subject to all the provisions of the Certificate of Incorporation and
all amendments thereto and resolutions of the Board of Directors providing for
the issue of shares of Common Stock (copies of which may be obtained from the
secretary of the Corporation), to all of which the holder of this certificate by
acceptance hereof assents.

For value received,                        hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

--------------------------------------------------------------------------------
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

__________________________________________________________________________shares

of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint

________________________________________________________________________Attorney
to transfer the said stock on the books of the within named Corporation will
full power of substitution in the premises.

 Dated
         ---------

                           -----------------------------------------------------
                           NOTICE: The signature to this assignment must
                           correspond with the name as written upon the face of
                           the certificate in every particular, without
                           alteration or enlargement or any change whatever.

 Signature(s) Guaranteed:

--------------------------------------------------------------------------------
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO
S.E.C. RULE 17Ad-15).

The holder of this certificate shall be entitled to receive funds from the trust
account only in the event that the holder seeks to convert his respective shares
into cash upon a business combination which he voted against and which is
actually completed by the Company. In no other circumstances shall the holder
have any right or interest of any kind in or to the trust account.

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