He cheated. Bodyguards can't take plasma guns. Not that you'd want them to have them anyway, so it's kind of a pointless cheat, but they can't actually change their equipment; only the squad's veterans can. Also, the heavy weapons team in the platoon should have replaced two Guardsmen, not been in addition to them, so he also had too many bodies. Also also, I only count one Troops choice.
This is made up for by his incompetence, however. He actually positioned the Russ such that you could penetrate it with krak missiles on turn 1?