DEFSEC TECHNOLOGIES — Regulatory Filings 2022

Nov 25, 2022

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November 25, 2022 File No.: 321890.00018 /21037

VIA SEDAR

British Columbia Securities Commission Alberta Securities Commission Financial and Consumer Affairs Authority of Saskatchewan The Manitoba Securities Commission Ontario Securities Commission New Brunswick Financial and Consumer Services Commission Nova Scotia Securities Commission Office of the Superintendent of Securities, Prince Edward Island Office of the Superintendent of Securities, Service Newfoundland and Labrador

Dear Sirs/Mesdames:

Re: KWESST Micro Systems Inc. (the “Issuer”) Amended and Restated Final Short Form Base PREP Prospectus

We refer to the amended and restated final short form base PREP prospectus dated November 25, 2022 of KWESST Micro Systems Inc. in relation to the offering of units (the “ Prospectus ”).

We hereby consent to the reference to our firm name in the introduction section and under the heading of “Legal Matters” and to the reference to our firm name and to the use of our opinions under the headings “Eligibility for Investment” and “Canadian Federal Income Tax Considerations” in the Prospectus.

We confirm that we have read the Prospectus and have no reason to believe that there are any misrepresentations in the information contained in the Prospectus that is derived from our opinions referred to above or that is within our knowledge as a result of the services we performed in connection with such opinions.

This letter is delivered to the addressees pursuant to the requirements of Section 4.2(a)(vii) of National Instrument 44-101 - Short Form Prospectus Distributions .

Yours truly,

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