Throw like 2-4 grandades at it and it dissapears, I found this out by using nades on a gunner xD It does respawn back though =(

Oh, And if you want to kill someone in stlye, Use nades, There Excelent, Once, on the enimes roof, there were a few snipers and threw in 2 nades under that little cover thing, and they all went through that and some stayed up there, some fell and some went back through =0 It was AMAZING!!!