SPECIMEN UNIT CERTIFICATE


SPECIMEN UNIT CERTIFICATE

	NUMBER

U-                    

	UNITS


	SEE REVERSE FOR 

CERTAIN 

DEFINITIONS

	 
	 	 
	ARGYLE SECURITY ACQUISITION CORPORATION


	 	 
	 	CUSIP




UNITS CONSISTING OF ONE SHARE OF COMMON STOCK AND ONE WARRANT

EACH TO PURCHASE ONE SHARE OF COMMON STOCK

	THIS CERTIFIES THAT

	 
	 
	is the owner 

of

	 	Units.


	 


Each Unit (“Unit”) consists of one (1) share of common stock, par value $.0001 per share (“Common Stock”), of ARGYLE SECURITY ACQUISITION CORPORATION, a Delaware corporation (the “Company”), and one warrant (the “Warrant”). Each Warrant entitles the holder to purchase one (1) share of Common Stock for $6.00 per share (subject to adjustment). Each Warrant will become exercisable on the later of (i) the Company’s completion of a business combination with a target business or (ii),                       2006 and will expire unless exercised before 5:00 p.m., New York City Time, on                      , 2009, or earlier upon redemption (the “Expiration Date”). The Common Stock and Warrant comprising the Units represented by this certificate will trade separately on the 20th trading day following the earlier to occur of the expiration of the underwriter’s over-allotment option or its exercise in full; provided, however, in no event will the representative of the underwriters allow separate trading of the common stock and warrants until the Company files an audited balance sheet reflecting the Company’s receipt of the gross proceeds of the offering. The terms of the Warrants are governed by a Warrant Agreement, dated as of                      , 2005, 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, 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

	 	 	 
	 	 
	 	Chairman of the Board

	 	Secretary














ARGYLE SECURITY ACQUISITION CORPORATION

CORPORATE

SEAL

2005

DELAWARE

ARGYLE SECURITY ACQUISITION 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:

TEN COM - as tenants in common

TEN ENT - as tenants by the entireties

JT TEN -

as joint tenants with right of survivorship

and not as tenants in common

	UNIF GIFT MIN ACT -

	 	Custodian

	 	 
	 	(Cust)

	 	(Minor)


	 	under Uniform Gifts to Minors


	 	Act

	 	 
	 	 	(State)




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.









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	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).















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