If you notice, the one guy with the 16 hits the railing right in front of him. Happens when you have a scope much higher than the muzzle, and an inexperienced guy behind it.
I would go with at least some 7.62 nato (308, 7.62 x 51) rifles, better reach and more punch. A Barret or two would be a good idea,too.
these are the most unprofessional professionals I’ve ever seen. wrong weapons, wrong techniques and you name it.