That's battlefield four (Guide:
BF4-1), not chapter three. Chapter three starts at BF12. BF3 is the one were you saved Durant.
Anyways. The weapon advantages and disadvantages are not the only thing you should be paying attention to. You should also pay attention to units' effects, terrain, time of day, elements, etc. Knowing the weapon's triangle (especially since there are a lot more weapons than those three)
will not get you through the game.
Писатель всегда будет в оппозиции к политике, пока сама политика будет в оппозиции к культуре.