SEC Filing Document

Company: DUKE Robotics Corp.
Ticker: DUKR
CIK: 1638911
Filing Type: S-1MEF
Document Type: EX-5.1
Date Filed: 2026-05-14
Accession Number: 0001213900-26-057067
Exchange: OTC
SIC Code: 3721
SIC Description: Aircraft
URL: https://www.sec.gov/Archives/edgar/data/1638911/000121390026057067/ea029099401ex5-1.htm

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Exhibit 5.1

May 14, 2026

DUKE Robotics Corp.

10 HaRimon Street

Mevo Carmel Science and Industrial Park

Israel, 2069203

Ladies and Gentlemen:

We have acted as counsel to DUKE Robotics Corp., a Nevada corporation
(the “Company”), in connection with its preparation of a registration statement on Form S-1 (File No. 333-294808) filed
with the U.S. Securities and Exchange Commission (the “SEC”) on April 1, 2026 under the Securities Act of 1933, as
amended (the “Securities Act”), and a registration statement filed pursuant to Rule 462(b) of the Securities Act (the
“462(b) Registration Statement”) with respect to the registration of (I) securities (inclusive of the over-allotment
securities), consisting of units (the “Units”), each Unit consisting of (x) one share (collectively, the “Shares”)
of common stock of the Company, par value $0.0001 per share, for an aggregate of $1,408,750 (the “Common Stock”) and
(y) one warrant (collectively, the “Common Warrants”) to purchase one share of Common Stock, for an aggregate of $1,926,250
(collectively, the “Common Warrant Shares”, and (II) $140,875 in shares of Common Stock (the “Representative
Warrant Shares” and together with the Common Warrant Shares, the “Warrant Shares”) issuable upon exercise
of warrants to be issued to the representative of the several underwriters named in the Registration Statement (the “Representative
Warrants” and together with the Common Warrants, the “Warrants”). The Units, the Shares, Warrants and the
Warrant Shares are collectively referred to herein as the “Securities.” The Securities will be offered and sold pursuant
to an underwriting agreement (the “Underwriting Agreement”) by and between the Company and Maxim Group LLC (the “Underwriter”).
The 462(b) Registration Statement incorporates by reference the Registration Statement.

As counsel to the Company in connection with the
proposed issuance and sale of the securities pursuant to the Underwriting Agreement (the “Offering”), we have examined:
(i) the Company’s certificate of incorporation, as amended, and bylaws, as amended, each as currently in effect; (ii) certain resolutions
of the Company’s board of directors relating to the Offering; (iii) the form of Underwriting Agreement; (iv) the form of Warrant;
(v) the form of Representative’s Warrants, (vi) the Registration Statement and the 462(b) Registration Statement; and (vii) such
other proceedings, documents, and records as we have deemed necessary to enable us to render this opinion. In all such examinations, we
have assumed the genuineness of all signatures, the authenticity of all documents, certificates, and instruments submitted to us as originals,
and the conformity with the originals of all documents, certificates, and instruments submitted to us as copies. We have also assumed
the due execution and delivery of all documents where due execution and delivery are prerequisite to the effectiveness thereof.

Our opinions set forth below with respect to the
validity or binding effect of any security or obligation may be limited by (i) bankruptcy, insolvency, reorganization, fraudulent conveyance,
marshaling, moratorium or other similar laws affecting the enforcement generally of the rights and remedies of creditors and secured parties
or the obligations of debtors, (ii) general principles of equity (whether considered in a proceeding in equity or at law), including but
not limited to principles limiting the availability of specific performance or injunctive relief, and concepts of materiality, reasonableness,
good faith and fair dealing, (iii) the possible unenforceability under certain circumstances of provisions providing for indemnification,
contribution, exculpation, release or waiver that may be contrary to public policy or violative of federal or state securities laws, rules
or regulations, and (iv) the effect of course of dealing, course of performance, oral agreements or the like that would modify the terms
of an agreement or the respective rights or obligations of the parties under an agreement.

Based upon, subject to and limited by the foregoing
we are of the opinion that following (i) execution and delivery by the Company and the Underwriter of the Underwriting Agreement and of
the Warrants, (ii) effectiveness of the Registration Statement, (iii) issuance of the Securities pursuant to the terms of the Underwriting
Agreement, and (iv) receipt by the Company of the applicable consideration for the Securities:

(i) the Shares will be duly
authorized for issuance and, when issued, delivered and paid for in accordance with the terms of the Underwriting Agreement, and in accordance
with and in the manner described in the Registration Statement, will be validly issued, fully paid and nonassessable shares of Common
Stock;

(ii) provided that the Warrants
have been duly executed and delivered by the Company against payment therefor pursuant to their terms, and pursuant to the Underwriting
Agreement, such Warrants, when sold and issued as contemplated in the Registration Statement, will be valid and binding obligations of
the Company enforceable against the Company in accordance with their terms; and

(iii) the Warrant Shares
issuable upon payment to the Company of the required consideration, when issued and sold by the Company and paid for in accordance with
the terms of the Underwriting Agreement and the Warrants, as applicable, as described in the Registration Statement, will be validly issued,
fully paid and non-assessable shares of Common Stock.

It is understood that this opinion is to be used
only in connection with the offer, sale, and issuance of the Securities while the Registration Statement and the 462(b) Registration Statement
are in effect.

This opinion speaks only as of the date hereof
and we assume no obligation to update or supplement this opinion if any applicable laws change after the date of this opinion or if we
become aware after the date of this opinion of any facts, whether existing before or arising after the date hereof, that might change
the opinions expressed above. This opinion is furnished in connection with the filing of the Registration Statement and may not be relied
upon for any other purpose without our prior written consent in each instance. Further, no portion of this opinion may be quoted, circulated
or referred to in any other document for any other purpose without our prior written consent.

We hereby consent to the filing of this opinion
with the SEC as Exhibit 5.1 to the 462(b) Registration Statement. In giving such consent, we do not thereby admit that we come within
the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the SEC promulgated
thereunder.

Very truly yours,

/s/ Sullivan & Worcester LLP

Sullivan & Worcester LLP