EX-10.4





 Exhibit 10.4 

First Light Acquisition Group, Inc. 

11110 Sunset Hills Road #2278 

Reston, VA 20190 
 September 9,
2021 
 First Light Acquisition Group, LLC 
 11110 Sunset Hills
Road #2278 
 Reston, VA 20190 
 Re: Administrative Services
Agreement 
 Ladies and Gentlemen: 
 This
letter agreement by and between First Light Acquisition Group, Inc. (the “Company”) and our sponsor, First Light Acquisition Group, LLC (the “Sponsor”), dated as of the date hereof, will confirm our agreement that,
commencing on the date that the securities of the Company are first listed on the New York Stock Exchange (the “Listing Date”), pursuant to a Registration Statement on Form S-1 and a
prospectus filed with the Securities and Exchange Commission (the “Registration Statement”) and continuing until the earlier of the consummation by the Company of an initial business combination or the Company’s liquidation (in
each case as described in the Registration Statement) (such earlier date hereinafter referred to as the “Termination Date”): 

(i) The Sponsor shall provide to the Company certain administrative support and services as may be reasonably required by the Company. In
exchange therefor, the Company shall pay the Sponsor the sum of $10,000 per month on the Listing Date and continuing monthly thereafter until the Termination Date; and 

(ii) The Sponsor hereby irrevocably waives any and all right, title, interest, causes of action and claims of any kind as a result of, or
arising out of, this letter agreement (each, a “Claim”) in or to, and any and all right to seek payment of any amounts due to it out of, the trust account established for the benefit of the public stockholders of the Company and
into which substantially all of the proceeds of the Company’s initial public offering will be deposited (the “Trust Account”), and hereby irrevocably waives any Claim it presently has or may have in the future, which Claim
would reduce, encumber or otherwise adversely affect the Trust Account or any monies or other assets in the Trust Account, and further agrees not to seek recourse, reimbursement, payment or satisfaction of any Claim against the Trust Account or any
monies or other assets in the Trust Account for any reason whatsoever. 
 This letter agreement constitutes the entire agreement and
understanding of the parties hereto in respect of its subject matter and supersedes all prior understandings, agreements, or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter
hereof or the transactions contemplated hereby. 
  












 This letter agreement may not be amended, modified or waived as to any particular provision,
except by a written instrument executed by the parties hereto. 
 No party hereto may assign either this letter agreement or any of its
rights, interests, or obligations hereunder without the prior written approval of the other party. Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or
title to the purported assignee. 
 This letter agreement constitutes the entire relationship of the parties hereto with respect to the
subject matter described herein, and any litigation between the parties (whether grounded in contract, tort, statute, law or equity) shall be governed by, construed in accordance with, and interpreted pursuant to the laws of the State of New York,
without giving effect to its choice of laws principles. 
 [Signature Page Follows] 

 

  
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	Very truly yours,
	
	FIRST LIGHT ACQUISITION
	GROUP, INC.
		
	By:	 	 /s/ William J. Weber

		 	Name: William J. Weber
		 	Title: Chief Executive Officer


  

			
	AGREED TO AND ACCEPTED BY
	
	FIRST LIGHT ACQUISITION
	GROUP, LLC
		
	By:	 	FLAG Sponsor Manager, LLC, on
		 	behalf of Series 1 through Series 15 of First Light Acquisition Group, LLC, a Delaware series limited liability company
		
	By:	 	 /s/ William J. Weber

		 	Name: William J. Weber
		 	Title: Manager

 [Signature Page to Administrative Services Agreement]