Well, first, I would assume it means two pulls of the M-16A2 on three round burst mode. Second, very nice shot by the SAW team. I also suspect a sniper from the RPG man's left rear. He gets tapped from two directions just before he sets down. Does anyone concur?
If I'm right, that's some very professional cooperation between the platoon leader and his NCO and the Scout Sniper team.
Well done, Marines!
Be Seeing You,
Chris