Exhibit
4.1


 


 





	NUMBER	___________ SHARES
	_______	 




  


 


GLOBAL DEFENSE & NATIONAL SECURITY SYSTEMS,
INC.

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

COMMON STOCK


 


SEE REVERSE FOR

CERTAIN DEFINITIONS


CUSIP________________


 


THIS CERTIFIES THAT _____________________________________________


 


IS THE OWNER OF _____________________________________________________________


 


FULLY PAID AND NON−ASSESSABLE
SHARES OF THE PAR VALUE OF $0.0001 EACH

OF THE COMMON STOCK OF



GLOBAL DEFENSE & NATIONAL SECURITY SYSTEMS, INC.

(THE "COMPANY")


 


TRANSFERABLE ON THE BOOKS OF THE COMPANY IN PERSON OR BY DULY
AUTHORIZED ATTORNEY UPON SURRENDER OF THIS CERTIFICATE PROPERLY ENDORSED. THE COMPANY WILL BE FORCED TO REDEEM ALL OF ITS SHARES
OF COMMON STOCK IF IT IS UNABLE TO COMPLETE A BUSINESS COMBINATION BY _______, 20__ [21 MONTHS FROM THE DATE OF THE DATE OF THE
COMPANY’S FINAL PROSPECTUS] ALL AS MORE FULLY DESCRIBED IN THE COMPANY'S FINAL PROSPECTUS DATED _____, 2013. THIS CERTIFICATE
IS NOT VALID UNLESS COUNTERSIGNED BY THE TRANSFER AGENT AND REGISTERED BY THE REGISTRAR. WITNESS THE FACSIMILE SIGNATURES OF ITS
DULY AUTHORIZED OFFICERS.


 


DATED:


 





	 	 	 	[Corporate Seal

Delaware]	 
	 	 	 	 	 
	By:	 	 	 	 
	 	Chairman of the Board of Directors	 	 	Secretary
	 	 	 	 	 
	By:	 	 	 	 
	 	Transfer Agent	 	 	 




 






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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 	 	under Uniform Gifts to     
	 	right of survivorship and 	 	Minors Act __________
	 	not as tenants in common 	 	(State)


 


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


 


GLOBAL DEFENSE & NATIONAL SECURITY SYSTEMS,
INC.


 


Global Defense & National Security Systems,
Inc. (the “Company”) 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 Company and the qualifications,
limitations, or restrictions of such preferences and/or rights. This certificate and the shares represented hereby are issued and
shall be held subject to all the provisions of the Certificate of Incorporation of the Company and all amendments thereto and resolutions
of the Board of Directors providing for the issue of securities (copies of which may be obtained from the secretary of the Company),
to all of which the holder of this certificate by acceptance hereof assents.


 


FOR VALUE RECEIVED, ___________________________
HEREBY SELLS, ASSIGNS AND TRANSFERS UNTO


 


(PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF
ASSIGNEE)


 





 





 





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


 





 





 


_____________________________________________________________________
SHARES OF THE CAPITAL STOCK REPRESENTED BY THE WITHIN CERTIFICATE, AND DOES HEREBY IRREVOCABLY CONSTITUTE AND APPOINT ____________________
ATTORNEY TO TRANSFER THE SAID STOCK ON THE BOOKS OF THE WITHIN NAMED CORPORATION WITH 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) MUST 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 SECURITIES AND EXCHANGE COMMISSION.


RULE 17Ad−15).


 


The holder of this certificate shall be
entitled to receive funds from the trust account established by the Company (the “Trust Account”) only in the event
of the Company’s liquidation or redemption because it does not merge with, engage in a share exchange with, purchase all
or substantially all of the assets of, or engage in any other similar business combination with one or more businesses or assets
(a “Business Combination”), or if the holder seeks to convert his respective shares into cash in connection with a
stockholder vote to approve a proposed Business Combination or in connection with a tender offer setting forth the details of a
proposed Business Combination. 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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