# EXHIBIT 10.7

Execution Form

# WAIVER AND SIXTH
AMENDMENT TO
FOURTH AMENDED AND RESTATED CREDIT AGREEMENT

This
Waiver and Sixth Amendment to Fourth Amended and Restated Credit Agreement (this
Amendment) dated as of May 2, 2003 (the Amendment Effective
Date), is by and among MAGNUM HUNTER RESOURCES, INC., a Nevada
corporation (the Borrower), each Bank (as defined in the Credit
Agreement referred to below), DEUTSCHE BANK TRUST COMPANY AMERICAS(formerly named
Bankers Trust Company), individually, as administrative agent (in such capacity, together
with its successors in such capacity, the Administrative Agent), as
collateral agent (in such capacity, together with its successors in such capacity, the
Collateral Agent), and as letter of credit issuing bank (in such
capacity, together with its successors in such capacity, the Issuer),
CIBC INC., individually and as syndication agent (in such capacity together with
its successors in such capacity, the Syndication Agent), and BNP
PARIBAS, a French bank acting through its Houston Agency, individually and as
documentation agent (in such capacity, together with its successors in such capacity, the
Documentation Agent).

R E C I T A L S:

WHEREAS,
the Borrower, each Bank then a party, the Administrative Agent, the Collateral Agent, the
Syndication Agent, the Documentation Agent (collectively, the Agents),
and the Issuer have heretofore entered into that certain Fourth Amended and Restated
Credit Agreement dated as of March 15, 2002, as amended by that certain First Amendment to
Fourth Amended and Restated Credit Agreement dated as of April 19, 2002, and by that
certain Second Amendment to Fourth Amended and Restated Credit Agreement dated as of July
3, 2002, and by that certain Third Amendment to Fourth Amended and Restated Credit
Agreement dated as of August 28, 2002, and by that certain Fourth Amendment to Fourth
Amended and Restated Credit Agreement dated as of September 6, 2002, and by that certain
Waiver and Fifth Amendment dated as of November 20, 2002, and as otherwise amended from
time to time prior to the Amendment Effective Date (the Credit
Agreement), pursuant to which the Banks have agreed to make revolving credit
loans available to the Borrower under the terms and provisions stated therein; and

WHEREAS,
the Borrower has requested that the Banks, the Agents and the Issuer waive the provisions
of Section 7.2.6 of the Credit Agreement, which limits certain Restricted Payments (as
defined therein), in order to permit the Borrower to redeem and retire notes issued under
the 1997 Indenture (1997 Notes) in an aggregate principal amount of up
to $50,000,000 from and after the Amendment Effective Date through and including September
30, 2003 (the Permitted 2003 Redemption); and

WHEREAS,
the Borrower has also requested that the Banks, the Agents and the Issuer waive the
provisions of Section 7.2.6 of the Credit Agreement in order to permit the Borrower to
redeem and retire additional 1997 Notes in an aggregate principal amount of up to
$60,000,000 (which, for the avoidance of doubt, shall be in addition to any 1997 Notes
redeemed and retired pursuant to the Permitted 2003 Redemption) with the proceeds of the
issuance by the Borrower of any one (but only one) of the following types of securities:
(i) preferred stock, convertible preferred stock or other coupon-bearing equity securities
of the Borrower, (ii) Subordinated Debt of the Borrower, or (iii) senior unsecured notes
issued under a first supplemental bond indenture to the 2002 Indenture, (individually, as
applicable, the Permitted Refinancing Securities); provided,
however, that (A) in any case, such Permitted Refinancing Securities shall contain
terms and conditions satisfactory to the Administrative Agent and the Borrower, (B) the
Net Cash Proceeds of such issuance shall be used, and shall only be used, to redeem and
retire 1997 Notes (including any reasonable costs, expenses or fees associated with such
redemption and retirement), (C) any Permitted Refinancing Securities of the type described
in clause (i) above shall not (1) be subject to any mandatory repurchase or redemption
election exercisable by the holder thereof on or prior to June 1, 2007, (2) obligate the
Borrower (or any Restricted Subsidiary) to make any payments other than accrued dividends
to the holders of such Permitted Refinancing Securities on or prior to June 1, 2007, or
(3) accrue dividends at a rate (or effective yield) in excess of the effective after-tax
interest rate applicable to the 1997 Notes (such dividends, the Permitted
Refinancing Dividends), and (D) any Permitted Refinancing Securities of the type
described in clause (ii) or (iii) above shall have a yield to maturity at issuance equal
to or less than 10% and shall mature not sooner than June 1, 2007 (the Permitted
Refinancing Redemption); and

WHEREAS,
the Borrower has requested that the Credit Agreement be amended to allow BMO Nesbitt Burns
Financing, Inc. (BMO), Australia and New Zealand Banking Group Limited
(ANZ), Southwest Bank of Texas N.A. (Southwest) and
Sterling Bank (Sterling) to become Banks party to the
Credit Agreement, as set forth herein; and

WHEREAS,
the Borrower also proposes that certain other amendments and modifications be made to the
Credit Agreement as set forth herein; and

WHEREAS,
subject to the terms and conditions of this Amendment, the Banks (including BMO, ANZ,
Southwest and Sterling), the Agents and the Issuer have agreed to enter into this
Amendment in order to effectuate such amendments and modifications;

NOW,
THEREFORE, in consideration of the premises herein contained and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the parties
hereto agree as follows:

Section 1. Definitions.  Capitalized  terms used in this  Amendment,  to the extent  not  otherwise  defined
herein, shall have the same meaning as in the Credit Agreement.

Section 2. Amendments to Credit Agreement.  The Credit Agreement is hereby amended as follows:

|(a) | The definition of Interest Period in Section 1.1 of the Credit
          Agreement is hereby amended by (i) deleting the words one, two, three or
          six months thereafter and inserting in their place the words one,
          two, three, six or, if (and only if) then available to all of the Banks, twelve
          months thereafter and (ii) amending and restating clause (a) of such
          definition in its entirety to provide (a) the Borrower shall not be
          permitted to select Interest Periods to be in effect at any one time which have
          expiration dates occurring on more than eight (8) different dates;".
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|(b) | The following definition of Lead Manager is hereby inserted in
          Section 1.1 of the Credit Agreement in its alphabetically appropriate place:
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| |   Lead  Manager  means any of Bank of  Scotland,  Bank of Nova Scotia,
                  Bank  of  Montreal  or  Fortis  Capital  Corp.,  and  any  successor   thereto,
                  respectively.  Lead Managers means all of them.
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(c) | The definition of Stated Maturity Date in Section 1.1 of the Credit
          Agreement is hereby amended and restated in its entirety to provide:
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| | 
Stated Maturity Date means May 2, 2006 (as such date may be extended
from time to time pursuant to Section 2.9).
| | ---------------------------------------------------------------------------------------------------------------------

|(d) | Clause (k) of Section 7.2.5 of the Credit Agreement is hereby amended and
          restated in its entirety to provide:
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|(k) | so long as no Default has occurred and is continuing and so long as after
                    giving effect thereto Borrowing Base Usage is not greater than 80%, the Borrower
                    may make Investments not otherwise permitted pursuant to this
                    Section 7.2.5 not to exceed $25,000,000 in the aggregate for all
                    such Investments; provided that if the Borrower or any of its Restricted
                    Subsidiaries shall have made any Investments pursuant to this clause (k) and the
                    Borrower or any of its Restricted Subsidiaries shall thereafter receive any
                    dividends or returns of capital from an Unrestricted Subsidiary (but expressly
                    excluding any amounts received as loans pursuant to Section 7.2.2(m)),
                    then the amount available thereafter to the Borrower and its Restricted
                    Subsidiaries for additional Investments pursuant to this clause (k) shall be
                    increased dollar for dollar by the amount of such dividends or returns of
                    capital up to a maximum amount of availability not to exceed $25,000,000 at any
                    time;".
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|(e) | Clauses (A) and (B) of the proviso in Section 7.2.6 of the Credit Agreement are
          hereby amended and restated in their entirety to provide:
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| | (A) $25,000,000,
plus (B) fifty percent (50%) of the Borrowers consolidated net income,
to be calculated on a cumulative basis, for each Fiscal Year commencing with the Fiscal
Year ending December 31, 2001, minus.
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(f) | Section 7.2.7 of the Credit Agreement is hereby amended by deleting the amount
          $50,000,000 at the end thereof and inserting in its place the amount
          $60,000,000".
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|(g) | Section
9.8 of the Credit Agreement is hereby amended and restated in its entirety to provide as
follows:
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| | SECTION
9.8 Documentation Agent, Syndication Agent, Arrangers, Lead Managers and
Bookrunner. The Documentation Agent, the Syndication Agent, the Arrangers, the Lead
Managers and the sole bookrunner shall not have any obligations, liabilities,
responsibilities or duties under this Agreement or the other Loan Documents. Without
limiting the foregoing, the Documentation Agent, the Syndication Agent, the Arrangers, the
Lead Managers and the sole bookrunner shall not have or be deemed to have any fiduciary
relationship with any Bank or any other Agent. Each Bank acknowledges that it has not
relied, and will not rely, on any of the Banks so identified or on the Documentation
Agent, the Syndication Agent, the Arrangers, the Lead Manager or the sole bookrunner in
deciding to enter into this Agreement or in taking or not taking action hereunder.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(h) | The Credit Agreement is hereby amended by deleting the existing Schedule III-B
          to the Credit Agreement and inserting in its place as the new Schedule III-B to
          the Credit Agreement the text contained in Attachment 1 attached to this
          Amendment.
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Section 3. Additional  Amendments  to  Credit  Agreement  Dependent  Upon  Type of  Permitted  Refinancing
Securities Issued.

|(a) | If, and only if, the Borrower issues Permitted Refinancing Securities of the
          type described in clause (iii) of the third recital above, then the definition
          of 2002 Indenture in Section 1.1 of the Credit Agreement shall be
          deemed to be automatically and concurrently amended to include the first
          supplemental bond indenture pursuant to which such Permitted Refinancing
          Securities have been issued, together with any related documentation, each as
          amended, restated, modified or supplemented form time to time.
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|(b) | If, and only if, the Borrower issues Permitted Refinancing Securities of the
          types described in clauses (ii) or (iii) of the third recital above, then
          Section 7.2.2 of the Credit Agreement shall be deemed to be automatically and
          concurrently amended to permit the Indebtedness represented by such Permitted
          Refinancing Securities as if Section 7.2.2 of the Credit Agreement specifically
          described such Permitted Refinancing Securities; provided that the principal
          amount thereof shall not in any event exceed the sum of (x) the aggregate
          principal amount of 1997 Notes to be redeemed and retired with Net Cash Proceeds
          of such Permitted Refinancing Securities, (y) the aggregate amount of any
          interest or premium payable in respect of the redemption and retirement of such
          1997 Notes to the holders thereof, and (z) any reasonable and customary costs,
          expenses and fees payable in respect of the redemption and retirement of such
          1997 Notes.
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|(c) | If, and only if, the Borrower issues Permitted Refinancing Securities of the
          type described in clause (i) of the third recital above, then Section 7.2.6(a)
          of the Credit Agreement shall be deemed to be automatically and concurrently
          amended to permit the payment by the Borrower of any Permitted Refinancing
          Dividends in accordance with the terms of such Permitted Refinancing Securities
          notwithstanding anything to the contrary in Section 7.2.6(a).
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Section 4. BMO, ANZ, Southwest and Sterling as Banks.

|(a) | Upon the effectiveness of this Amendment and by its execution and delivery
          hereof, each of BMO, ANZ, Southwest and Sterling shall be deemed automatically
          to have become a party to the Credit Agreement, shall have all the rights and
          obligations of a Bank under the Credit Agreement and the other Loan
          Documents as if each were an original signatory thereto, and shall agree, and
          does hereby agree, to be bound by the terms and conditions set forth in the
          Credit Agreement and the other Loan Documents to which the Banks are a party, in
          each case, as if each were an original signatory thereto.
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|(b) | Each of BMO, ANZ, Southwest and Sterling (i) confirms that it has received a
          copy of the Credit Agreement, together with copies of the financial statements
          referred to in Section 7.1.1 thereof and such other documents and information as
          it has deemed appropriate to make its own credit analysis and decision to enter
          into this Amendment and the Credit Agreement; (ii) agrees that it will,
          independently and without reliance upon any Agent, the Issuer, any Arranger or
          any other Bank and based on such documents and information as it shall deem
          appropriate at the time, continue to make its own credit decisions in taking or
          not taking action under the Credit Agreement; (iii) represents and warrants that
          its name set forth herein is its legal name; (iv) appoints and authorizes each
          Agent to take such action as agent on its behalf and to exercise such powers and
          discretion under the Loan Documents as are delegated to such Agent by the terms
          thereof, together with such powers and discretion as are reasonably incidental
          thereto; (vi) agrees that it will perform in accordance with their terms all of
          the obligations that by the terms of the Credit Agreement are required to be
          performed by it as a Bank; and (vii) attaches any U.S. Internal Revenue Service
          forms required under Section 4.6(b) of the Credit Agreement.
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|(c) | Each of BMO, ANZ, Southwest and Sterling hereby advises each other party hereto
          that its respective address for notices, its respective Domestic Lending Office
          and its respective LIBOR Office shall be as set forth below its name on
          Attachment 2 hereto.
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Section 5.    Waiver of Section 7.2.6 of Credit Agreement.

| | (a) | Section 7.2.6 of the Credit Agreement, which restricts the Borrower and any of
               its Restricted Subsidiaries from making any payment or prepayment of principal
               of, or making any payment of interest on, any Indebtedness on any day other than
               the stated, scheduled date for such payment or prepayment set forth in the
               documents and instruments memorializing such Indebtedness, or which would
               violate the subordination provisions of any Subordinated Debt (except as
               expressly permitted by Section 7.2.6 of the Credit Agreement or as otherwise
               permitted in writing by the Administrative Agent with the consent of the
               Majority Banks), is hereby waived insofar as, and only insofar as, the Borrower
               or any of its Restricted Subsidiaries shall be permitted to:
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| | (i) | redeem and retire 1997 Notes in an aggregate principal amount of up to
               $50,000,000 during the period from and after the Amendment Effective Date to
               (and including) September 30, 2003, and
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (ii) | redeem and retire additional 1997 Notes in an aggregate principal amount of up
               to $60,000,000, provided that the excess, if any, of (A) the sum of (x) the
               aggregate principal amount of such additional 1997 Notes to be redeemed and
               retired, (y) all interest and premium payable in respect of the redemption and
               retirement of such additional 1997 Notes to the holders thereof, and (z) all
               reasonable and customary costs, expenses and fees payable in respect of the
               redemption and retirement of such additional 1997 Notes, over (B) the Net Cash
               Proceeds of the issuance of the Permitted Refinancing Securities, shall not
               exceed $5,000,000 (the Refinancing Excess), which Refinancing Excess
               may be funded, if necessary, with the proceeds of Loans made under the Credit
               Agreement;
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | provided,
however, that, in each case, no Event of Default shall have occurred and be
continuing as of the date of such redemption and retirement.
| | --------------------------------------------------------------------------------------------------------------------------------------------------

|(b) | The parties hereto acknowledge and agree that the redemption of 1997 Notes by
          the Borrower or any of its Restricted Subsidiaries as permitted by this Section
          5 shall not reduce the remaining availability of the Borrower or its Restricted
          Subsidiaries to make other Restricted Payments in accordance with, and to the
          extent permitted by, Section 7.2.6 of the Credit Agreement.
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Section 6.  Increase of Borrowing Base; Restriction on Borrowing Availability.

|(a) | Subject to the restrictions on availability set forth in clause (b) of this
          Section 6, the Borrowing Base shall be increased to $300,000,000 from and after
          the Amendment Effective Date until the Borrowing Base shall either be reduced in
          accordance with clause (c) of this Section 6 or otherwise redetermined in
          accordance with the Credit Agreement.
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|(b) | Notwithstanding anything to the contrary in the Credit Agreement or this
          Amendment, the Borrower covenants and agrees that from and after the Amendment
          Effective Date until September 30, 2003, the Borrower shall maintain at all
          times sufficient availability under the Credit Agreement to redeem and retire
          1997 Notes in a principal amount equal to the positive difference (if any) of
          (i) $50,000,000, minus (ii) the principal amount of all 1997 Notes
          redeemed or retired by the Borrower from and after the Amendment Effective Date
          as part of the Permitted 2003 Redemption (but expressly excluding for purposes
          of this subclause (ii) any 1997 Notes redeemed as part of the Permitted
          Refinancing Redemption), as evidenced by the written confirmation delivered in
          accordance with Section 9.
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|(c) | Unless the Borrowing Base shall have been redetermined in accordance with the
          Credit Agreement (in which case this Section 6(c) shall automatically become
          void), the Borrowing Base shall automatically be reduced on October 1, 2003 from
          $300,000,000 to an amount equal to (i) $250,000,000 plus (ii) the
          aggregate principal amount of 1997 Notes redeemed and retired as part of the
          Permitted 2003 Redemption (but expressly excluding any 1997 Notes redeemed and
          retired as part of the Permitted Refinancing Redemption), as evidenced by the
          written confirmation delivered in accordance with Section 9, until the Borrowing
          Base shall be redetermined in accordance with the Credit Agreement.
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|(d) | Both the Borrower, on the one hand, and the Administrative Agent and the Banks,
          on the other hand, agree that none of the redeterminations of, or adjustments
          to, the Borrowing Base pursuant to this Section 6 shall constitute a special
          redetermination of the Borrowing Base pursuant to Section 2.8.3 of the Credit
          Agreement.
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Section 7. Covenant to Redeem and Retire.  The Borrower covenants and agrees that:

|(a) | the Borrower shall use (i) the Net Cash Proceeds of the Permitted Refinancing
          Securities, and (ii) so long as the aggregate principal amount of 1997 Notes
          redeemed as part of the Permitted 2003 Redemption is less than $50,000,000, the
          proceeds of any Loans under the Credit Agreement that, after giving effect to
          such Loans, would cause the aggregate amount of all Loans and all Letter Credit
          Liabilities then outstanding to exceed $250,000,000, in each case, only to
          redeem and retire 1997 Notes (including the payment of any reasonable and
          customary costs, expenses and fees associated therewith) and for no other
          purpose;
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|(b) | so long as the aggregate principal amount of 1997 Notes redeemed as part of the
          Permitted 2003 Redemption is less than $50,000,000, any Borrowing Request
          submitted by the Borrower that would cause the aggregate outstanding principal
          amount of all Loans plus the aggregate amount of all Letter of Credit
          Liabilities to exceed $250,000,000 (after giving effect to such Borrowing) shall
          specifically direct that all of the proceeds of such Borrowing shall be
          deposited into an account at a depository institution for the purposes of
          redeeming and retiring the 1997 Notes, provided that such depository institution
          and the type and nature of such account shall both be acceptable to the
          Administrative Agent;
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|(c) | upon the issuance of the Permitted Refinancing Securities, the Borrower shall
          cause the Net Cash Proceeds of the Permitted Refinancing Securities to be
          deposited into, and thereafter maintained in, an account at a depository
          institution for the purposes of redeeming and retiring the 1997 Notes, provided
          that such depository institution and the type and nature of such account shall
          both be acceptable to the Administrative Agent;
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|(d) | not later than five (5) Business Days immediately following the date on which
          the Borrower receives the proceeds of the issuance of the Permitted Refinancing
          Securities, the Borrower shall deliver a notice of redemption under Section 3.04
          of the 1997 Indenture by which the Borrower shall notify the holders of the 1997
          Notes that the Borrower is redeeming 1997 Notes having a principal amount that,
          together with all interest and premium payable thereon and all reasonable and
          customary costs, expenses and fees payable with respect to the redemption and
          retirement thereof, equals at least the Net Cash Proceeds of the Permitted
          Refinancing Securities;
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|(e) | promptly following the Amendment Effective Date the Borrower shall cause all
          1997 Notes previously repurchased by the Borrower or any Subsidiary of the
          Borrower to be retired in accordance with the provisions of the 1997 Indenture.
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Section 8. Conditions
Precedent. The effectiveness of this Amendment is subject to the satisfaction of the
following conditions precedent:

|(a) | Executed Amendment. The Administrative Agent shall have received a
          counterpart of this Amendment duly executed by the Borrower, the Agents, the
          Issuer and each Bank, and duly acknowledged by each of the Guarantors.
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|(b) | Replacement Notes. The Borrower shall deliver to the Administrative Agent
          on behalf of each Bank listed on Attachment 1 hereto a promissory note dated the
          Effective Date and payable to each such Bank in a maximum principal amount equal
          to such Banks Percentage (as shown on Attachment 1 hereto) of Five Hundred
          Million Dollars, which Note shall be a renewal and replacement of, and shall be
          given in substitution and exchange for, but not in payment of, those Notes held
          by each Existing Bank (as defined below) prior to the effectiveness of this
          Amendment.
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|(c) | Opinion of Counsel. The Administrative Agent shall have received an
          opinion of the general counsel of the Borrower in form and substance reasonably
          acceptable to the Administrative Agent with respect to the enforceability of
          this Amendment.
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|(d) | Other Conditions. The Borrower shall have confirmed and acknowledged to
          the Agents, the Issuer and the Banks, and by its execution and delivery of this
          Amendment the Borrower does hereby confirm and acknowledge to the Administrative
          Agent and the Banks, that (i) the execution, delivery and performance of this
          Amendment has been duly authorized by all requisite corporate action on the part
          of the Borrower; (ii) the Credit Agreement and each other Loan Document to which
          it is a party constitute valid and legally binding agreements enforceable
          against the Borrower in accordance with their respective terms, except as such
          enforceability may be limited by bankruptcy, insolvency, reorganization,
          moratorium, fraudulent transfer or other similar laws relating to or affecting
          the enforcement of creditors rights generally and by general principles of
          equity; (iii) the representations and warranties by the Borrower contained in
          the Credit Agreement and in the other Loan Documents are true and correct on and
          as of the date hereof in all material respects as though made as of the date
          hereof; and (iv) no Default or Event of Default exists under the Credit
          Agreement or any of the other Loan Documents.
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Section 9. Condition
Subsequent. Promptly following the redemption and retirement of any 1997 Notes, the
Borrower covenants to deliver to the Administrative Agent a certificate of an Authorized
Officer of the Borrower setting forth the principal amount of all 1997 Notes that have
been redeemed and retired by the Borrower since the Amendment Effective Date in accordance
with the 1997 Indenture, together with such other related materials evidencing such
redemption and retirement as the Administrative Agent may request in its sole discretion.

Section 10. Fees. Concurrently
with the effectiveness of this Amendment, the Borrower shall pay to the Administrative
Agent for the account of each Bank a fee equal to one-eighth of one percent (0.125)% of
each Banks respective Percentage (immediately after giving effect to this Amendment)
of $300,000,000.

Section 11. Ratification of Credit
Agreement. Except as expressly amended, modified or waived by this Amendment, the
terms and provisions of the Credit Agreement and the other Loan Documents are ratified and
confirmed in all respects and shall continue in full force and effect.

Section 12. Expenses. The
Borrower agrees to pay on demand all expenses set forth in Section 10.3 of the Credit
Agreement.

Section 13. Renewal and Continuation of Existing Loans. Upon the effectiveness of this Amendment:

|(a) | All of the Obligations outstanding under the Credit Agreement as of the date of
          such effectiveness shall hereby be restructured, rearranged, renewed, extended
          and continued under the Credit Agreement (as amended hereby) and all Loans
          outstanding under the Credit Agreement as of the date of such effectiveness
          shall hereby become Loans outstanding under the Credit Agreement (as amended
          hereby).
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|(b) | In connection herewith, Banks party to the Credit Agreement prior to the
          effectiveness of this Amendment (the Existing Banks) hereby
          sell, assign, transfer and convey, and each of BMO, ANZ, Southwest and Sterling
          hereby purchases and accepts, so much of the aggregate Commitments under, Loans
          outstanding under, and participations in Letters of Credit issued pursuant to,
          the Credit Agreement such that the Percentage of each Bank (including the
          Existing Banks and each of BMO, ANZ, Southwest and Sterling) shall be as set
          forth on Schedule III-B to the Credit Agreement. The foregoing assignments,
          transfers and conveyances are without recourse to the Existing Banks and without
          any warranties whatsoever by any Agent, the Issuer or any Existing Bank as to
          title, enforceability, collectibility, documentation or freedom from liens or
          encumbrances, in whole or in part, other than the warranty of each Existing Bank
          that it has not previously sold, transferred, conveyed or encumbered such
          interests.
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Section 14. Miscellaneous. (a)
On and after the effectiveness of this Amendment, each reference in each Loan Document to
this Agreement, this Note, this Mortgage, this
Guaranty, this Pledge Agreement, hereunder,
hereof or words of like import, referring to such Loan Document, and each
reference in each other Loan Document to the Credit Agreement, the
Notes, the Mortgages, the Guaranty, the Pledge
Agreement, thereunder, thereof or words of like import
referring to the Credit Agreement, the Notes, or the Mortgage, the Guaranty, the Pledge
Agreement or any of them, shall mean and be a reference to such Loan Document, the Credit
Agreement, the Notes, the Mortgage, the Guaranty, the Pledge Agreement or any of them, as
amended or otherwise modified by this Amendment; (b) the execution, delivery and
effectiveness of this Amendment shall not operate as a waiver of any default of the
Borrower or any right, power or remedy of the Administrative Agent or the Banks under any
of the Loan Documents, nor constitute a waiver of any provision of any of the Loan
Documents; (c) this Amendment may be executed in any number of counterparts and by
different parties hereto in separate counterparts, each of which when so executed shall be
deemed to be an original and all of which taken together shall constitute one and the same
agreement; and (d) delivery of an executed counterpart of a signature page to this
Amendment by telecopier shall be effective as delivery of a manually executed counterpart
of this Amendment.

Section 15. Severability. Any
provisions of this Amendment held by court of competent jurisdiction to be invalid or
unenforceable shall not impair or invalidate the remainder of this Amendment and the
effect thereof shall be confined to the provisions so held to be invalid or unenforceable.

Section 16. Applicable Law.
THIS AMENDMENT AND EACH OTHER LOAN DOCUMENT DELIVERED PURSUANT HERETO SHALL EACH BE
DEEMED TO BE A CONTRACT MADE UNDER AND GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE
INTERNAL LAWS OF THE STATE OF NEW YORK (WITHOUT GIVING EFFECT TO THE PRINCIPLES THEREOF
RELATING TO CONFLICT OF LAW, EXCEPT SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS
LAW). This Amendment constitutes the entire understanding among the parties hereto
with respect to the subject matter hereof and supersedes any prior agreements, written or
oral, with respect thereto.

Section 17. Successors and
Assigns. This Amendment is binding upon and shall inure to the benefit of the Agents,
the Issuer, the Banks and the Borrower and their respective successors and assigns.

Section 18. Headings. The
headings, captions, and arrangements used in this Amendment are for convenience only and
shall not affect the interpretation of this Amendment.

Section 19. NO ORAL
AGREEMENTS. THIS AMENDMENT AND ALL OTHER INSTRUMENTS, DOCUMENTS AND AGREEMENTS
EXECUTED AND DELIVERED IN CONNECTION HEREWITH REPRESENT THE FINAL AGREEMENT AMONG THE
PARTIES WITH RESPECT TO THE MATTERS HEREIN CONTAINED, AND MAY NOT BE CONTRADICTED BY
EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS BETWEEN THE PARTIES.
THERE ARE NO UNWRITTEN ORAL AGREEMENTS AMONG THE PARTIES.

[Signature pages follow]

Page 10

EXECUTED as of the day and
year first above written.

| | BORROWER:MAGNUM HUNTER RESOURCES, INC.By:/s/Chris Tong      Name:       Chris Tong      Title:        Senior Vice President                      Chief Financial Officer                                              
| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | AGENTS, BANKS AND ISSUER:DEUTSCHE BANK TRUST COMPANY AMERICAS (formerly named Bankers Trust Company), as Administrative Agent, Collateral Agent, Issuer and a Bank By: ________________________      Name:      Title:
| | CIBC INC., as Syndication Agent and a Bank By: ________________________       Name:      Title:                                                                                                                       

S-1

| | BNP PARIBAS, as Documentation Agent and a BankBy:_____________________      Name:     Title:
                    - and -
By:_____________________       Name:      Title:
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | FORTIS CAPITAL CORP., as a BankBy:_____________________      Name:     Title:
                     - and -
By:_____________________      Name:     Title:                
| | BANK OF SCOTLAND, as a BankBy: ________________________       Name:       Title:                                                                                         
| | BANK OF NOVA SCOTIA, as a BankBy: ________________________      Name:      Title:                                                                                        

S-2

| | UNION BANK OF CALIFORNIA, N.A., as a BankBy: ________________________      Name:      Title:
| | --------------------------------------------------------------------------------------------
| | COMPASS BANK, as a BankBy: ________________________      Name:      Title:                  
| | COMERICA BANK - TEXAS, as a BankBy: ________________________       Name:      Title:        
| | WASHINGTON MUTUAL BANK, FA, as a BankBy: __________________________       Name:      Title: 
| | HIBERNIA NATIONAL BANK, as a BankBy: __________________________      Name:      Title:      

S-3

| | U.S. BANK NATIONAL ASSOCIATION, as a BankBy: __________________________       Name:      Title:                 
| | ----------------------------------------------------------------------------------------------------------------
| | BMO NESBITT BURNS FINANCING, INC., as a BankBy: __________________________       Name:      Title:              
| | AUSTRALIA AND NEW ZEALAND BANKING GROUP LIMITED, as a BankBy: __________________________       Name:      Title:
| | SOUTHWEST BANK OF TEXAS N.A., as a BankBy: __________________________       Name:      Title:                   
| | STERLING BANK, as a BankBy: __________________________       Name:      Title:                                  

S-4

ACKNOWLEDGMENT BY
GUARANTORS

Each
of the undersigned Guarantors hereby (i) consents to the terms and conditions of that
certain Waiver and Sixth Amendment to Fourth Amended and Restated Credit Agreement dated
as of May 2, 2003 (the Sixth Amendment), (ii) acknowledges and agrees
that its consent is not required for the effectiveness of the Sixth Amendment, (iii)
ratifies and acknowledges its respective Obligations under each Loan Document to which it
is a party, and (iv) represents and warrants that (a) no Default or Event of Default has
occurred and is continuing, (b) it is in full compliance with all covenants and agreements
pertaining to it in the Loan Documents, and (c) it has reviewed a copy of the Sixth
Amendment.

Executed
to be effective as of May 2, 2003.

| | GUARANTORS:HUNTER GAS GATHERING, INC.GRUY PETROLEUM MANAGEMENT CO.MAGNUM HUNTER PRODUCTION, INC.CONMAG ENERGY CORPORATIONTRAPMAR PROPERTIES, INC. PINTAIL ENERGY, INC. PRIZE OPERATING COMPANYPEC (DELAWARE), INC.OKLAHOMA GAS PROCESSING, INC. By:  /s/Chris Tong     Name:     Chris Tong     Title:       Senior Vice President and                     Chief Financial Officer
| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | PRIZE ENERGY RESOURCES, L.P.By:     Prize Operating Company,           as its general partner
By:_________________________      Name:     Senior Vice President and                     Chief Financial Officer                                                                                                                                                                   

S-5

ATTACHMENT 1

Schedule III-B

PERCENTAGES

|Bank                                            | Percentage
|----------------------------------------------- | ----------
|Deutsche Bank Trust Company Americas            |           
|CIBC Inc.                                       |           
|BNP Paribas                                     |           
|Fortis Capital Corp.                            |           
|Bank of Nova Scotia                             |           
|Bank of Scotland                                |           
|BMO Nesbitt Burns Financing, Inc.               |           
|Union Bank of California, N.A                   |           
|Washington Mutual Bank, FA                      |           
|Australia and New Zealand Banking Group Limited |           
|Comerica Bank - Texas                           |           
|Compass Bank                                    |           
|U.S. Bank National Association                  |           
|Hibernia National Bank                          |           
|Southwest Bank of Texas, N.A                    |           
|Sterling Bank                                   |           
|Totals                                          |           

Attachment 1 - Page 1

ATTACHMENT 2

|Address for Notices:      Institution Name:      Attention:       Telephone:       Facsimile: | BMO Nesbitt Burns Financing, Inc.BMO Nesbitt Burns Financing, Inc.  James Ducote  700 Louisiana, Suite 4400 Houston, Texas  77002 713-546-9760 713-223-4007
|--------------------------------------------------------------------------------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------
|Domestic Office:       Telephone:       Facsimile:                                            | 700 Louisiana, Suite 4400Houston, Texas  77002713-546-9760713-223-4007                                                                                     
|LIBOR Office:        Telephone:        Facsimile:                                             | 700 Louisiana, Suite 4400 Houston, Texas  77002 713-546-9760713-223-4007                                                                                   

Attachment 2 - Page 1

|Address for Notices:       Institution Name:      Attention:        Telephone:       Facsimile: | Australia and New Zealand Banking Group Limited  Australia and New Zealand Banking Group Limited  George Sloecklein 1177 Avenue of the Americas  6th Floor   New York, NY  10038 212-801-9113212-536-9223
|----------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Domestic Office:          Telephone:      Facsimile:                                            | 1177 Avenue of the Americas 6th Floor New York, NY  10038  212-801-9113 212-536-9223                                                                                                                     
|LIBOR Office:        Telephone:      Facsimile:                                                 | 1177 Avenue of the Americas  6th Floor  New York, NY  10038   212-801-9113  212-536-9223                                                                                                                 

Attachment 2 - Page 2

|Address for Notices:        Institution Name:     Attention:        Telephone:        Facsimile: | Southwest Bank of Texas N.A.Southwest Bank of Texas N.A.  W. Bryan Chapman 4400 Post Oak Parkway, Suite 400 Houston, Texas  77027 713-232-2026 713-561-0345
|------------------------------------------------------------------------------------------------ | -----------------------------------------------------------------------------------------------------------------------------------------------------------
|Domestic Office:          Telephone:      Facsimile:                                             | 4400 Post Oak Parkway, Suite 400   Houston, Texas  77027  713-232-2026713-561-0345                                                                         
|LIBOR Office:         Telephone:       Facsimile:                                                | 4400 Post Oak Parkway, Suite 400 Houston, Texas  77027 713-232-2026 713-561-0345                                                                           

Attachment 2 - Page 3

|Address for Notices:       Institution Name:     Attention:       Telephone:      Facsimile: | Sterling Bank Sterling Bank Melissa Bauman2550 North Loop WestSuite 100Houston, Texas 77092 713-507-7377 713-507-7948
|-------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------
|Domestic Office:       Telephone:     Facsimile:                                             | 2550 North Loop WestSuite 100 Houston, Texas 77092713-507-7377 713-507-7948                                          
|LIBOR Office:       Telephone:      Facsimile:                                               | 2550 North Loop West Suite 100 Houston, Texas 77092 713-507-7377713-507-7948                                         

Attachment 2 - Page 4