FIRST AMENDMENT TO
SERIES D WARRANT AGREEMENT

          THIS FIRST AMENDMENT is entered into as of this 9 day of November, 2009, between XStream Systems, Inc., a Delaware corporation (the “Company”), and the Holders from time to time of the Warrants created under the Series D Warrant Agreement dated as of August 27, 2009 (the “Warrant Agreement”) between the Company and such Holders.

          WHEREAS, the Company is party to the Warrant Agreement providing for the issuance from time to time of Warrants designated the Series D Warrants to purchase shares of Common Stock of the Company;

          WHEREAS, the Company and the Holders desire to amend the Warrant Agreement in order to include the Company’s 2009 Long Term Incentive Plan and any successor plans within the meaning of the term “Option Plan” as hereinafter provided;

          WHEREAS, the Company and the Holders desire to further amend the Warrant Agreement in order to in order to prevent the grant of 1,000,000 options or other share-based award in such amount to Mr. James Lowrey from triggering an adjustment to the Exercise Price of the Warrants;

          WHEREAS, the Company and the Holders desire to amend various other sections of the Warrant Agreement in order to accommodate for the Company’s anticipated initial public offering of its debt and equity securities, including restricting the Holder’s ability to exercise the Warrants for a period of three years after the IPO Effective Date (defined herein), as hereinafter provided; and

          WHEREAS, the Company and the Majority Warrant Holders have approved and consented to this Amendment as indicated by their signatures affixed hereto.

          NOW, THEREFORE, in consideration of the foregoing, the parties hereto hereby agree as follows:

     1. Amendment.

          (a) Section 2.1. Section 2.1 of the Warrant Agreement shall be amended as follows:

          (i) The existing definition of “Convertible Securities” shall be deleted in its entirety and replaced with the following new definition:

          “Convertible Securities” means any stock or securities directly or indirectly convertible into or exchangeable for Common Stock, except for securities issued in connection with a Public Offering.

          (ii) The existing definition of “Option Plan” shall be deleted in its entirety and replaced with the following new definition:

          “Option Plan” means the Company’s Amended and Restated 2004 Stock Option Incentive Plan, as amended by that certain First Amendment, dated as of July 23, 2009, and the Company’s 2009 Long Term Compensation Plan, including any amendments thereto or successor plan thereof.

          (iii) The defined term “Qualified IPO” is hereby deleted in its entirety.

          (v) The following new defined terms and their respective meanings shall be inserted in their appropriate alphabetical order:

          “IPO Effective Date” means the effective date of the registration statement relating to the Company’s initial Public Offering.

          “Public Offering” means any offering by the Company of its debt or equity securities to the public pursuant to an effective registration statement under the Securities Act, as then in effect, or any comparable statement under any similar federal statute then in force.

          “Restriction Period” means the time period beginning on the IPO Effective Date and ending on the date that is three (3) years after the IPO Effective Date.

          (b) Section 3.2(a). Section 3.2(a) of the Warrant Agreement shall be amended by deleting the term “Original Issue Date” in the first sentence thereof and replacing it with the phrase “expiration of the Restriction Period”.

          (c) Section 5.2(b). Section 5.2(b) of the Warrant Agreement shall be amended as follows:

          (i) by deleting subsection (x) thereof in its entirety and replacing it with the following new subsection (x):

          “(x) securities issued in connection with a Public Offering;”

          (ii) by appending the following as a new subsection (xi) immediately after new subsection (x) thereof and renumbering the remaining subsections which follow thereafter accordingly:

          “(xi) 1,000,000 incentive stock options or other share-based award in such amount to Mr. James Lowrey, current chairman and chief executive officer of the Company, approved at the August 14, 2009 meeting of the Board in consideration for services rendered to the Company;”

          (d) Section 8.1. Section 8.1 of the Warrant Agreement shall be amended by deleting subclauses (d) and (e) and subclause (iii) therein in their entirety. Any grammatical or other adjustments necessary in the language surrounding such deletions shall be deemed to have been made and incorporated therein in all respects.

          (e) Section 12. The text in Section 12 of the Warrant Agreement is hereby deleted in its entirety and the phrase “Intentionally Deleted.” shall be inserted in its place.

          (f) Exhibit A. The first sentence of the main paragraph of Exhibit A to the Warrant Agreement shall be deleted in its entirety and replaced with the following new first sentence:

     “This Series D Warrant Certificate entitles [                    ], and its permitted assigns, to purchase from XStream Systems, Inc., a Delaware corporation (the “Company”), [___] shares of duly authorized, validly issued, fully paid and nonassessable shares of common stock, par value $0.0001 per share (the “Common Stock”), of the Company at the purchase price per share of $3.00 (subject to adjustment as provided in Section 5 of the hereinafter defined Warrant Agreement (as so adjusted, the “Exercise Price”)), at any time or from time to time beginning on the three (3) year anniversary of the effective date of the registration statement relating to the Company’s initial public offering of its debt or equity securities pursuant to a registration statement declared effective under the Securities Act of 1933, as amended, and prior to 5:00 P.M., New York, New York time, on August 27, 2019 (such date, the “Expiration Date”), all subject to the terms and conditions set forth in the Warrant Agreement, dated as of August 27, 2009 (as may be amended, modified or restated from time to time, the “Warrant Agreement”), by and among the Company and the holders from time to time of the Warrants (the “Holders”).”

     2. Reference to and Effect on Warrant Agreement; Reaffirmation.

          (a) Upon the effectiveness of this Amendment, each reference in the Warrant Agreement to “this Agreement,” “hereunder,” “hereof,” “herein,” “hereby” or words of like import shall mean and be a reference to the Warrant Agreement as amended hereby, and each reference to the Warrant Agreement in any other document, instrument or agreement executed and/or delivered in connection with the Warrant Agreement, the Original Purchase Agreement and/or the Series D Purchase Agreement shall mean and be a reference to the Warrant Agreement as amended hereby.

          (b) Except as specifically amended hereby, the Warrant Agreement shall remain in full force and effect and is hereby ratified and confirmed. The execution, delivery and effectiveness of this Amendment shall not constitute a waiver of any provision contained in the Warrant Agreement, except as specifically set forth herein.

     3. Governing Law. In all respects, including all matters of construction, validity and performance, this Amendment and the Warrants and the obligations arising hereunder and thereunder shall be governed by, and construed and enforced in accordance with, the laws of the State of Florida applicable to contracts made and performed in such state, except with respect to the validity of this Amendment and the Warrants, the issuance of Warrant Stock upon exercise of

the Warrants and the rights and duties of the Company with respect to registration of transfer, which shall be governed by the laws of the State of Delaware.

     4. Recitals. The recitals set forth above are true, accurate, and incorporated herein by reference.

     5. Interpretation.

          (a) Capitalized terms used herein without definition shall have the respective definitions assigned to those terms in the Warrant Agreement, as amended by this Amendment.

          (b) Headings of Sections are inserted for convenience of reference only and shall not be deemed a part of or to affect the meaning or interpretation of this Amendment.

          (c) This Amendment may be executed in two or more counterparts, all of which when taken together shall be considered one and the same agreement, it being understood that the parties need not sign the same counterpart.

          (d) Each of the parties to this Amendment has had the benefit of counsel in connection with its review and negotiation of this Amendment. Consequently, the parties confirm that this Amendment shall not be construed on the basis of any presumption or rule requiring construction or interpretation against the party drafting an agreement or instrument or causing any agreement or instrument to be drafted.

[Signature Page Follows]

     IN WITNESS WHEREOF, the Company has caused this Amendment to be executed as of the day and year first above written.

		XSTREAM SYSTEMS, INC.
		By:		/s/ Anthony Chidoni
		Name: Title:		Anthony Chidoni Secretary

[Holders’ signature pages follow.]

[Signature Page to First Amendment to Series D Warrant Agreement]

[OMNIBUS SIGNATURE PAGES TO WRITTEN CONSENT OF A

MAJORITY OF THE SECURITYHOLDERS OF

XSTREAM SYSTEMS, INC.]