This video just show how this glitch work. It only work with mg with bipod inside the tunnel. This glitch ready been patch during Bitzkrieg Event, i believe this glitch not been patch since release date. If you encounter this glitch after the patch, the player maybe use some sort of cheating tool. And if you try this glitch, the games will kill you in the tunnel when it collapse.
Hope your enjoy this gameplay.
P.s: don’t be angry about this video, I’m just showing how powerful this glitch was because no one can counter this glitch no one can kill you and also no one can see you either.