FORM OF LOCK-UP AGREEMENT

Exhibit 10.5

EXHIBIT A

Form of Lock-Up Agreement

[●], 2026

Prime Number Capital LLC

27F 12E 49th Street

New York, NY 10017

As Underwriter of the Company

Ladies and Gentlemen:

The undersigned understands that Prime Number Capital LLC, the representative (the “Representative”) of the underwriters (the “Underwriters”), proposes to enter into an underwriting agreement (the “Underwriting Agreement”) with, MSAV HOLDINGS LTD, a Cayman Islands company (the “Company”), in connection with the public offering (the “Offering”) of the Company’s ordinary share, par value $0.00001 per share (the “Ordinary Shares”).

To induce the Underwriters to continue their efforts in connection with the Offering, the undersigned hereby agrees that, without the prior written consent of the Representative, the undersigned will not, for a period of 180 days from the closing of the sales of the Offering (the “Lock-Up Period”), (1) offer, pledge, announce the intention to sell, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, make any short sale, lend, or otherwise transfer or dispose of, directly or indirectly, any Ordinary Shares or any securities convertible into or exercisable or exchangeable for the Ordinary Shares, whether now owned or hereafter acquired by the undersigned or with respect to which the undersigned has or hereafter acquires the power of disposition (collectively, the “Lock-Up Securities”); (2) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Lock Up Securities, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of the Lock-Up Securities, in cash or otherwise; and (3) publicly disclose the intention to make any offer, sale, pledge or disposition, or to enter into any transaction, swap, hedge or other arrangement relating to the Lock-Up Securities. The foregoing sentence shall not apply to (a) transactions relating to the Ordinary Shares or other securities acquired in open market transactions after the completion of the Offering, or (b) transfers of the Lock-Up Securities as a bona fidegift, by will or intestacy or to a family member or trust for the benefit of a family member (for purposes of this lock-up agreement, “family member” means any relationship by blood, marriage or adoption, not more remote than first cousin); provided that in the case of any transfer or distribution pursuant to clause (b), each donee or distributee shall sign and deliver a lock-up letter substantially in the form of this letter agreement; (c) transfers of Lock-Up Securities to a charity or educational institution; (d) if the undersigned, directly or indirectly, controls a corporation, partnership, limited liability company or other business entity, any transfers of Lock-Up Securities to any shareholder, partner or member of, or owner of similar equity interests in, the undersigned, as the case may be; (e) if the undersigned is a trust, to a trustee or beneficiary of the trust; provided that in the case of any transfer pursuant to the foregoing clauses (b), (c) or (d), (i) any such transfer shall not involve a disposition for value, (ii) each transferee shall sign and deliver to the Representative a lock-up agreement substantially in the form of this lock-up agreement, and (iii) no filing under Section 13 of the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”) or other filing or public announcement shall be required or shall be voluntarily made, (f) the receipt by the undersigned from the Company of Shares upon the vesting of restricted share awards or share units or upon the exercise of options to purchase the Company’s Ordinary Shares issued under an equity incentive plan of the Company or an employment arrangement described in the Pricing Prospectus (as defined in the Underwriting Agreement) (the “Plan Shares”) or the transfer of Ordinary Shares or any securities convertible into Ordinary Shares to the Company upon a vesting event of the Company’s securities or upon the exercise of options to purchase the Company’s securities, in each case on a “cashless” or “net exercise” basis or to cover tax obligations of the undersigned in connection with such vesting or exercise, but only to the extent such right expires during the Lock-up Period, provided that no filing under Section 13 of the Exchange Act or other public announcement shall be required or shall be voluntarily made within 90 days after the date of the Underwriting Agreement, and after such 90th day, if the undersigned is required to file a report under Section 13 or Section 16(a) of the Exchange Act reporting a reduction in beneficial ownership of Ordinary Shares during the Lock-Up Period, the undersigned shall include a statement in such schedule or report to the effect that the purpose of such transfer was to cover tax withholding obligations of the undersigned in connection with such vesting or exercise and, provided further, that the Plan Shares shall be subject to the terms of this lock-up agreement; (g) the establishment of a trading plan pursuant to Rule 10b51 under the Exchange Act for the transfer of Lock-Up Securities, provided that (i) such plan does not provide for the transfer of Lock-Up Securities during the Lock-Up Period and (ii) no public announcement or filing under the Exchange Act will be voluntarily made by or on behalf of the undersigned or the Company regarding the establishment of such plan; and (h) the transfer of Lock-Up Securities that occurs by operation of law, such as pursuant to a qualified domestic order or in connection with a divorce settlement, provided that the transferee agrees to sign and deliver a lock-up agreement substantially in the form of this lock-up agreement for the balance of the Lock-Up Period, and provided further, that any filing under Section 13 of the Exchange Act that is required to be made during the Lock-Up Period as a result of such transfer shall include a statement that such transfer has occurred by operation of law (collectively, “Permitted Transfers”). In addition, the undersigned agrees that, without the prior written consent of the Representative, it will not, during the Lock-Up Period, make any demand for or exercise any right with respect to, the registration of any Lock-Up Securities or any security convertible into or exercisable or exchangeable for Lock-Up Securities, or publicly disclose the intention to make any offer, sale, pledge or disposition, or to enter into any transaction, swap, hedge or other arrangement relating to any Lock-Up Securities. The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent against the transfer of the undersigned’s Lock-Up Securities except in compliance with the foregoing restrictions.

No provision in this lock-up agreement shall be deemed to restrict or prohibit (i) the adoption of an equity incentive plan and the grant of awards or equity pursuant to any equity incentive plan, and the filing of a registration statement on Form S-8; provided, however, that any sales by parties to this lock-up agreement shall be subject to this lock-up agreement, (ii) the issuance of Ordinary Shares in connection with the exercise of outstanding options or warrants of the Company; provided that this lock-up agreement shall apply to any of the undersigned’s shares issued upon such exercise, or (iii) the issuance of securities in connection with an acquisition or a strategic relationship which may include the sale or equity securities; provided, that none of such shares shall be saleable in the public market until the expiration of the 180-day period described above.

If the undersigned is an officer or director of the Company, (i) the undersigned agrees that the foregoing restrictions shall be equally applicable to any securities that the undersigned may purchase in the Offering; and (ii) the Representative agrees that, at least three (3) business days before the effective date of any release or waiver of the foregoing restrictions in connection with a transfer of Lock-Up Securities, the Representative will notify the Company of the impending release or waiver. Any release or waiver granted by the Representative hereunder to any such officer or director shall only be effective two (2) business days after the release or waiver. The provisions of this paragraph will not apply if (a) the release or waiver is effected solely to permit a transfer of Lock-Up Securities not for consideration or in connection with any other Permitted Transfer and (b) the transferee has agreed in writing to be bound by the same terms described in this letter agreement to the extent and for the duration that such terms remain in effect at the time of such transfer.

The undersigned understands that the Company and the Underwriters are relying upon this lock-up agreement in proceeding toward consummation of the Offering. The undersigned further understands that this lock-up agreement is irrevocable and shall be binding upon the undersigned’s heirs, legal representative, successors and assigns.

The undersigned understands that, if (i) the Underwriting Agreement is not executed by [●], 2026, (ii) the Company notifies the Representative in writing that it does not intend to proceed with the Offering or (iii) the Underwriting Agreement (other than the provisions thereof which survive termination) shall terminate or be terminated prior to payment for and delivery of the Ordinary Shares to be sold thereunder, the undersigned shall be released from all obligations under this letter agreement.

Whether or not the Offering actually occurs depends on a number of factors, including market conditions. Any Offering will only be made pursuant to an Underwriting Agreement, the terms of which are subject to negotiation between the Company and the Underwriters. The undersigned acknowledges that no assurances are given by the Company or the Underwriters that any Offering will be consummated. This letter agreement shall be governed by, and construed in accordance with, the internal laws of the State of New York.

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