@Anrhaa I agree that the best way to enjoy a manga is to try to put yourself in the shoes of the MC, I just find his choice of weapons funny.
@RosaViola I'm about 99 percent sure the MC is a dude and that is his exosuit you are seeing boobs on.
So he sees that what's left of his party is right behind him and he pulls out a weapon with a back-bast of 200 meters... A stupid FPS player indeed. Amazingly, they aren't even scratched... maybe the author is as smart as the MC.