October 3, 2001 To the Banks party to the Credit Agreement referenced below Re: AMENDED AND RESTATED CREDIT AGREEMENT, dated as of November 7, 2000 (the "Credit Agreement"), among COMSTOCK RESOURCES, INC. a Nevada corporation ("CRI"), COMSTOCK OIL & GAS, INC., a Nevada corporation ("COG"), COMSTOCK OIL & GAS - LOUISIANA, INC., a Nevada corporation ("COGL"), COMSTOCK OFFSHORE, LLC, a Nevada limited liability company ("Offshore") (CRI, COG, COGL and Offshore may hereinafter collectively be referred to as the "Borrowers"), the lenders party hereto from time to time (collectively, the "Banks" and individually, a "Bank"), BNP PARIBAS, as documentation agent for the Banks (in such capacity, the "Documentation Agent"), TORONTO DOMINION (TEXAS), INC., as syndication agent for the Banks (in such capacity, the "Syndication Agent") and BANK ONE, NA, as administrative agent for the Banks (in such capacity, the "Agent"). Ladies/Gentlemen: The Borrowers hereby request, and Bank One, NA, as Agent, concurs, that the Credit Agreement shall be modified as follows: Reference in Section 7.2(j) and in 7.2(n) to "$10,000,000" shall be deleted and "$10,000,000 (except that for the period from and including October 3, 2001 to and including December 31, 2001 such amount shall be increased to $20,000,000, provided that if the aggregate amount of all Restricted Payments and Optional Indenture Payments since the Effective Date exceeds $10,000,000 (but does not exceed $20,000,000) after December 31, 2001 no Event of Default shall be deemed to have occurred as a result thereof, but no further Restricted Payments or Optional Indenture Payments may be made)" shall be substituted in each place thereof. Except as modified by the above, the Borrowers agree that the Credit Agreement and all other Loan Documents are ratified and confirmed and shall remain in full force and effect, and that they have no setoff, counterclaim, defense or other claim or dispute with respect to any of the foregoing. Each of the Borrowers represents and warrants to the Agent and the Banks that, after giving effect to this letter, the representations and warranties contained in the Credit Agreement and the other Loan Documents are true and correct on and as of the date hereof with the same force and effect as if made on and as of the date hereof and that no Default or Event of Default exists or has occurred and is continuing on the date hereof. All capitalized terms used but not defined herein shall have the meanings ascribed thereto in the Credit Agreement. If the provisions of this letter are acceptable to you, please sign where indicated below. This letter shall be effective when signed by the Required Banks and upon such signature the Credit Agreement shall be deemed amended as specified herein. This letter may be executed in any number of counterparts and telecopied signatures shall be effective as originals. Very truly yours, COMSTOCK RESOURCES, INC. By: /s/ROLAND O. BURNS Roland O. Burns , Senior Vice President COMSTOCK OIL & GAS, INC. By: /s/ROLAND O. BURNS Roland O. Burns , Senior Vice President COMSTOCK OIL & GAS, LOUISIANA, INC. By: /s/ROLAND O. BURNS Roland O. Burns , Senior Vice President COMSTOCK OFFSHORE, LLC By: /s/ROLAND O. BURNS Roland O. Burns , Senior Vice President Accepted and agreed: BANK ONE, NA (Main Office Chicago) as a Bank and as Agent By:/s/THOMAS F. BOTH Title: Director, Capital Markets TORONTO DOMINION (TEXAS), INC. as a Bank and as Syndication Agent By:/s/ANN S. SLANIS Title: Vice President BNP PARIBAS as a Bank and as Documentation Agent By:/s/ A. DAVID DODD Title: Vice President By:/s/LARRY ROBINSON Title: Vice President FORTIS CAPITAL CORP. By:/s/DARRELL W. HOLLEY Title: Managing Director By:/s/DEIRDRE SANBORN Title: Vice President CHRISTIANIA BANK OG KREDITKASSE, ASA By:/s/WILLIAM PHILLIPS Title: First Vice President By:/s/ANGELA DOGANCAY Title: Vice President CREDIT LYONNAIS NEW YORK BRANCH By:/s/ ATTILA KOC Title: Sr. Vice President GENERAL ELECTRIC CAPITAL CORPORATION By: ______________________ Title: ___________________ BANK OF SCOTLAND By:/s/ JOSEPH FRATIUS Title: Vice President NATEXIS BANQUES POPULAIRES By:/s/ DONOVAN C. BROUSSARD Title: Vice President By:/s/ RENAUD J. D'HERBS Title: Sr. Vice President and Regional Manager NATIONAL BANK OF CANADA By: /s/RANDALL WILHOIT Title: Vice President By: /s/DOUG CLARK Title: Vice President