One person on attacker team is bribed with xp to betray his team. The MG is as good for attackers as nipples on a breastplate, but gives defenders great crossfire once EV takes the left turn.
It doesn’t make sense for attackers to build something like this.
Two solutions:
a) switch the MG from attackers to defenders. Also, it would be accessed via a “gate generator”, which defenders must blow up with a C4 and attackers can simply construct to disable the MG. It would be similar to the railworks gate in Trainyard, but defenders would try to blow up the gate to MG.
b) move it a bit forward so it’s in view of attackers coming from left. As soon as an attacker comes around the corner, the MG operator is flanked.