Someone could be pulling his leg, but it sounds authentic. It's a version of the story that's been around before, although that really shouldn't add much to its credibility.
One of the many questions that remain unanswered is why were those Americans there. Allen West says the following, among other things, in Exclusive: Confidential source reveals to me what really happened in Benghazi:
And I learned, as I presumed, that there was a covert weapons scheme going on in Libya, Benghazi. We had been supplying radical Islamists with weapons against Libyan President Moammar Gadhafi, effectively supplying the enemy and destabilizing that country. And it seems that there was a CIA weapons buy-back program, the aim of which was to ship the retrieved weapons out of Libya through Turkey, and to the Islamist forces in Syria.
So is this a phony conspiracy theory? Or is this the truth? There are Democrats dedicated to hiding the truth, and it's looking like they had good reason. But Trey Gowdey's select committee should get to the bottom of it in spite of the coverup attempts.
Updated: For some reason my correction in the title didn't get copied and pasted before I hit "Publish." That's Allen West not Adam West. Holy smoking gun, Batman!