After some research, I am a little put off by the implications of this thread. Apparently, this was a vote on a buget amendment as per below. It is possible there was vote against giving power to the Chairman of the Committee on the Budget of the Senate instead of a direct attack on the 2A.
(ref.
http://thomas.loc.gov/cgi-bin/query/C?r113:./temp/~r113SfXHU8 )
SA 139. Mr. INHOFE submitted an amendment intended to be proposed by him to the concurrent resolution S. Con. Res. 8, setting forth the congressional budget for the United States Government for fiscal year 2014, revising the appropriate budgetary levels for fiscal year 2013, and setting forth the appropriate budgetary levels for fiscal years 2015 through 2023; which was ordered to lie on the table; as follows:
At the end of title III, add the following:
SEC. 3__. DEFICIT-NEUTRAL RESERVE FUND TO UPHOLD SECOND AMENDMENT RIGHTS AND PREVENT THE UNITED STATES FROM ENTERING INTO THE UNITED NATIONS ARMS TRADE TREATY.
The Chairman of the Committee on the Budget of the Senate may revise the allocations of a committee or committees, aggregates, and other appropriate levels in this resolution for one or more bills, joint resolutions, amendments, motions, or conference reports that relate to upholding Second Amendment rights, which shall include preventing the United States from entering into the United Nations Arms Trade Treaty, by the amounts provided in such legislation for those purposes, provided that such legislation would not increase the deficit or revenues over either the period of the total of fiscal years 2013 through 2018 or the period of the total of fiscal years 2013 through 2023.