What you mean is no one gave a rebuttal you wanted instead of the very obvious rebuttal.
For one, I don't know why I really care about this issue when Clinton would very clearly not have been the decision maker on this topic. The Sec. State is not responsible for supplying arms to foreign parties, that is a CIA/DoD question under the guidance of the White House (Obama.) Two, the entirety of the debate seems to be about some form filled out by some guy. There is no way the Sec of State is reviewing that level of detail. And, third, it is quite possible weapons were moved without her knowledge, especially without her knowing all of the specifics, such as the name of some random guy. The CIA/DoD really shouldn't want the names of their key resources floating around.
If there is something here, it is a question of Obama's foreign policy and the decisions they made to turn Libya into a failed state (something that is woefully underdiscussed because we don't want to admit that most of our military actions in the Arab world have produced poor results for the last decade.) It's not really a question of Clinton's participation in arms; it is a reminder that she has supported foreign policy decisions that really haven't turned out well.