First Person: Alek Skarlatos Narrates What Happened In His Own Video

From Ace of Spades HQ:

"I grabbed the AK at his feet, and began muzzlethumping him in the head with it."

He confirms the AK jammed. The terrorist's handgun also had no magazine in it -- guy might have hit the wrong button and quick-released the mag, in his own terror. (It amuses me to think the terrorist was in turn terrorized by the advancing Americans.)