PEPPERBALL TECHNOLOGIES, INC. 2000 STOCK OPTION PLAN

Exhibit 10.28

PEPPERBALL TECHNOLOGIES, INC.

2000 STOCK OPTION PLAN

1.1 Establishment. The PepperBall Technologies, Inc. 2000 Stock Option Plan (the “ Plan ” ) as established effective as of October 27, 2000, is hereby amended as of May 21, 2002.

1.2 Purpose. The purpose of the Plan is to advance the interests of the Participating Company Group and its stockholders by providing an incentive to attract, retain and reward persons performing services for the Participating Company Group and by motivating such persons to contribute to the growth and profitability of the Participating Company Group.

1.3 Term of Plan. The Plan shall continue in effect until the earlier of its termination by the Board or the date on which all of the shares of Stock available for issuance under the Plan have been issued and all restrictions on such shares under the terms of the Plan and the agreements evidencing Options granted under the Plan have lapsed. However, all Options shall be granted, if at all, within ten (10) years from the earlier of the date the Plan is adopted by the Board or the date the Plan is duly approved by the stockholders of the Company.

2.1 Definitions. Whenever used herein, the following terms shall have their respective meanings set forth below:

(a) “ Board ” means the Board of Directors of the Company. If one or more Committees have been appointed by the Board to administer the Plan, “ Board ” also means such Committee(s).

(b) “ Code ” means the Internal Revenue Code of 1986, as amended, and any applicable regulations promulgated thereunder.

(c) “ Committee ” means the Compensation Committee or other committee of the Board duly appointed to administer the Plan and having such powers as shall be specified by the Board. Unless the powers of the Committee have been specifically limited, the Committee shall have all of the powers of the Board granted herein, including, without limitation, the power to amend or terminate the Plan at any time, subject to the terms of the Plan and any applicable limitations imposed by law.

(d) “ Company ” means PepperBall Technologies, Inc., a Delaware corporation, or any successor corporation thereto.

(e) “ Consultant ” means a person engaged to provide consulting or advisory services (other than as an Employee or a Director) to a Participating Company, provided that the identity of such person, the nature of such services or the entity to which such services are provided would not preclude the Company from offering or selling securities to such

person pursuant to the Plan in reliance on either the exemption from registration provided by Rule 701 under the Securities Act or, if the Company is required to file reports pursuant to Section 13 or 15(d) of the Exchange Act, registration on a Form S-8 Registration Statement under the Securities Act.

(f) “ Director ” means a member of the Board or of the board of directors of any other Participating Company.

(g) “ Disability ” means the inability of the Optionee, in the opinion of a qualified physician acceptable to the Company, to perform the major duties of the Optionee’s position with the Participating Company Group because of the sickness or injury of the Optionee.

(h) “ Distribution ” means the distribution by Jaycor, Inc. to the holders of its common stock, by means of a pro rata distribution of all of the shares of the Company’s common stock owned by Jaycor pursuant to the terms of the Distribution Matters Agreement between Jaycor and the Company dated October 27, 2000.

(i) “ Distribution Date ” means the date on which Jaycor first ceases to be a member of the Participating Company Group.

(j) “ Distribution Option ” means an Option granted by the Company as part of the adjustment of stock options granted by Jaycor to reflect the separation of the Company from Jaycor effectuated by the Distribution.

(k) “ Employee ” means any person treated as an employee (including an officer or a Director who is also treated as an employee) in the records of a Participating Company and, with respect to any Incentive Stock Option granted to such person, who is an employee for purposes of Section 422 of the Code; provided, however, that neither service as a Director nor payment of a director’s fee shall be sufficient to constitute employment for purposes of the Plan. The Company shall determine in good faith and in exercise of its discretion whether an individual has become or ceased to be an Employee and the effective date of such individual’s employment or termination of employment, as the case may be. For purposes of an individual’s rights, if any, under the Plan as of the time of the Company’s determination, all such determinations by the Company shall be final, binding and conclusive, notwithstanding that the Company or any court of law or governmental agency makes a contrary determination.

(l) “ Exchange Act ” means the Securities Exchange Act of 1934, as amended.

(m) “ Fair Market Value ” means, as of any date, the value of a share of Stock or other property as determined by the Board, in its discretion, or by the Company, in its discretion, if such determination is expressly allocated to the Company herein, subject to the following:

(i) If, on such date, the Stock is listed on a national or regional securities exchange or market system, the Fair Market Value of a share of Stock shall be the closing price of a share of Stock (or the mean of the closing bid and asked prices of a share of

Stock if the Stock is so quoted instead) as quoted on the Nasdaq National Market, The Nasdaq SmallCap Market or such other national or regional securities exchange or market system constituting the primary market for the Stock, as reported in The Wall Street Journal or such other source as the Company deems reliable. If the relevant date does not fall on a day on which the Stock has traded on such securities exchange or market system, the date on which the Fair Market Value shall be established shall be the last day on which the Stock was so traded prior to the relevant date, or such other appropriate day as shall be determined by the Board, in its discretion.

(ii) If, on such date, the Stock is not listed on a national or regional securities exchange or market system, the Fair Market Value of a share of Stock shall be as determined by the Board in good faith without regard to any restriction other than a restriction which, by its terms, will never lapse.

(n) “ Incentive Stock Option ” means an Option intended to be (as set forth in the Option Agreement) and which qualifies as an incentive stock option within the meaning of Section 422(b) of the Code.

(o) “ Insider ” means an officer (including any person designated by the Board as an officer) or a Director of the Company or any other person whose transactions in Stock are subject to Section 16 of the Exchange Act.

(p) “ Jaycor ” means Jaycor, Inc., a California corporation or any successor corporation thereto.

(q) “ Jaycor Participating Group ” means at any point in time, all corporations which are, at that time, a parent corporation as defined by Section 424(e) of the Code or a subsidiary corporation as defined by Section 424(f) of the Code of Jaycor.

(r) “ Jaycor Service ” means employment or service performed for any member of the Jaycor Participating Group, whether in the capacity as an employee, consultant or director. An Optionee’s Jaycor Service shall not be deemed to have terminated merely because of a change in the capacity in which such Optionee renders service to the Jaycor Participating Group or a change in the member of the Jaycor Participating Group for which the Optionee renders service. Jaycor Service shall be determined in accordance with the applicable stock option plan under which the stock option giving rise to Distribution Option was granted.

(s) “ Nonstatutory Stock Option ” means an Option not intended to be (as set forth in the Option Agreement) or which does not qualify as an Incentive Stock Option.

(t) “ Option ” means a right to purchase Stock (subject to adjustment as provided in Section 4.2) pursuant to the terms and conditions of the Plan. An Option may be either an Incentive Stock Option or a Nonstatutory Stock Option.

(u) “ Option Agreement ” means a written agreement between the Company and an Optionee setting forth the terms, conditions and restrictions of the Option granted to the Optionee and any shares acquired upon the exercise thereof. An Option Agreement may consist of a form of “Notice of Grant of Stock Option” and a form of “Stock Option Agreement” incorporated therein by reference, or such other form or forms as the Board may approve from time to time.

(v) “ Optionee ” means a person who has been granted one or more Options.

(w) “ Parent Corporation ” means any present or future “parent corporation” of the Company, as defined in Section 424(e) of the Code.

(x) “ Participating Company ” means the Company or any Parent Corporation or Subsidiary Corporation.

(y) “ Participating Company Group ” means, at any point in time, all corporations collectively which are then Participating Companies.

(z) “ Rule 16b-3 ” means Rule 16b-3 under the Exchange Act, as amended from time to time, or any successor rule or regulation.

(aa) “ Securities Act ” means the Securities Act of 1933, as amended.

(bb) “ Service ” means: (i) an Optionee’s employment or service with the Participating Company Group, whether in the capacity of an Employee, a Director or a Consultant. An Optionee’s Service shall not be deemed to have terminated merely because of a change in the capacity in which the Optionee renders Service to the Participating Company Group or a change in the Participating Company for which the Optionee renders such Service, provided that there is no interruption or termination of the Optionee’s Service. Furthermore, an Optionee’s Service with the Participating Company Group shall not be deemed to have terminated if the Optionee takes any military leave, sick leave, or other bona fide leave of absence approved by the Company; provided, however, that if any such leave exceeds ninety (90) days, on the ninety-first (91st) day of such leave the Optionee’s Service shall be deemed to have terminated unless the Optionee’s right to return to Service with the Participating Company Group is guaranteed by statute or contract. Notwithstanding the foregoing, unless otherwise designated by the Company or required by law, a leave of absence shall not be treated as Service for purposes of determining vesting under the Optionee’s Option Agreement. The Optionee’s Service shall be deemed to have terminated either upon an actual termination of Service or upon the corporation for which the Optionee performs Service ceasing to be a Participating Company. Subject to the foregoing, the Company, in its discretion, shall determine whether the Optionee’s Service has terminated and the effective date of such termination, and (ii) notwithstanding any other provision of this Section, as to a Distribution Option, Service shall also include the Optionee’s Jaycor Service.

(cc) “ Stock ” means the common stock of the Company, as adjusted from time to time in accordance with Section 4.2.

(dd) “ Subsidiary Corporation ” means any present or future “subsidiary corporation” of the Company, as defined in Section 424(f) of the Code.

(ee) “ Ten Percent Owner Optionee ” means an Optionee who, at the time an Option is granted to the Optionee, owns stock possessing more than ten percent (10%) of the total combined voting power of all classes of stock of a Participating Company within the meaning of Section 422(b)(6) of the Code.

2.2 Construction. Captions and titles contained herein are for convenience only and shall not affect the meaning or interpretation of any provision of the Plan. Except when otherwise indicated by the context, the singular shall include the plural and the plural shall include the singular. Use of the term “or” is not intended to be exclusive, unless the context clearly requires otherwise.

3.1 Administration by the Board. The Plan shall be administered by the Board. All questions of interpretation of the Plan or of any Option shall be determined by the Board, and such determinations shall be final and binding upon all persons having an interest in the Plan or such Option.

3.2 Authority of Officers. Any officer of a Participating Company shall have the authority to act on behalf of the Company with respect to any matter, right, obligation, determination or election which is the responsibility of or which is allocated to the Company herein, provided the officer has apparent authority with respect to such matter, right, obligation, determination or election.

3.3 Powers of the Board. In addition to any other powers set forth in the Plan and subject to the provisions of the Plan, the Board shall have the full and final power and authority, in its discretion:

(a) to determine the persons to whom, and the time or times at which, Options shall be granted and the number of shares of Stock to be subject to each Option;

(b) to designate Options as Incentive Stock Options or Nonstatutory Stock Options;

(c) to determine the Fair Market Value of shares of Stock or other property;

(d) to determine the terms, conditions and restrictions applicable to each Option (which need not be identical) and any shares acquired upon the exercise thereof, including, without limitation, (i) the exercise price of the Option, (ii) the method of payment for shares purchased upon the exercise of the Option, (iii) the method for satisfaction of any tax withholding obligation arising in connection with the Option or such shares, including by the withholding or delivery of shares of stock, (iv) the timing, terms and conditions of the exercisability of the Option or the vesting of any shares acquired upon the exercise thereof, (v) the time of the expiration of the Option, (vi) the effect of the Optionee’s termination of Service on any of the foregoing, and (vii) all other terms, conditions and restrictions applicable to the Option or such shares not inconsistent with the terms of the Plan;

(e) to approve one or more forms of Option Agreement;

(f) to amend, modify, extend, cancel or renew any Option or to waive any restrictions or conditions applicable to any Option or any shares acquired upon the exercise thereof;

(g) to accelerate, continue, extend or defer the exercisability of any Option or the vesting of any shares acquired upon the exercise thereof, including with respect to the period following an Optionee’s termination of Service;

(h) to prescribe, amend or rescind rules, guidelines and policies relating to the Plan, or to adopt supplements to, or alternative versions of, the Plan, including, without limitation, as the Board deems necessary or desirable to comply with the laws of, or to accommodate the tax policy or custom of, foreign jurisdictions whose citizens may be granted Options; and

(i) to correct any defect, supply any omission or reconcile any inconsistency in the Plan or any Option Agreement and to make all other determinations and take such other actions with respect to the Plan or any Option as the Board may deem advisable to the extent not inconsistent with the provisions of the Plan or applicable law.

3.4 Administration with Respect to Insiders. With respect to participation by Insiders in the Plan, at any time that any class of equity security of the Company is registered pursuant to Section 12 of the Exchange Act, the Plan shall be administered in compliance with the requirements, if any, of Rule 16b-3.

3.5 Indemnification. In addition to such other rights of indemnification as they may have as members of the Board or officers or employees of the Participating Company Group, members of the Board and any officers or employees of the Participating Company Group to whom authority to act for the Board or the Company is delegated shall be indemnified by the Company against all reasonable expenses, including attorneys’ fees, actually and necessarily incurred in connection with the defense of any action, suit or proceeding, or in connection with any appeal therein, to which they or any of them may be a party by reason of any action taken or failure to act under or in connection with the Plan, or any right granted hereunder, and against all amounts paid by them in settlement thereof (provided such settlement is approved by independent legal counsel selected by the Company) or paid by them in satisfaction of a judgment in any such action, suit or proceeding, except in relation to matters as to which it shall be adjudged in such action, suit or proceeding that such person is liable for gross negligence, bad faith or intentional misconduct in duties; provided, however, that within sixty (60) days after the institution of such action, suit or proceeding, such person shall offer to the Company, in writing, the opportunity at its own expense to handle and defend the same.

4.1 Maximum Number of Shares Issuable. Subject to adjustment as provided in Section 4.2, the maximum aggregate number of shares of Stock that may be issued under the Plan shall be Five Million Eight Hundred Sixty-One Thousand Two Hundred Ninety (5,861,290) and shall consist of authorized but unissued or reacquired shares of Stock or

any combination thereof; provided, however, in no event shall more than Nine Hundred Eighty-Six Thousand Two Hundred Ninety (986,290) shares of Stock be available for issuance pursuant to Distribution Options. If an outstanding Option, other than a Distribution Option, for any reason expires or is terminated or canceled or if shares of Stock are acquired upon the exercise of an Option subject to a Company repurchase option and are repurchased by the Company at the Optionee’s exercise price, the shares of Stock allocable to the unexercised portion of such Option or such repurchased shares of Stock shall again be available for issuance under the Plan. Shares of Stock that are subject to a Distribution Option shall not again be available for issuance under the Plan if an outstanding Distribution Option expires or is terminated or canceled. Notwithstanding the foregoing, at any such time as the offer and sale of securities pursuant to the Plan is subject to compliance with Section 260.140.45 of Title 10 of the California Code of Regulations ( “ Section 260.140.45 ” ), the to