There a problem with the magnum and the Assault rifle.
The magnum is used in almost every online slayer mode as a primary go to gun. When everyone online is using the same gun all the time then you know the game is broken.
The problem with the AR is that it gets out matched by the magnum almost every time. The AR need a slight damage buff or the magnum needs its magazine capacity reduced to 7 rounds and lower rate of fire. Please fix the the weapons unbalanced problem 343
Please use the Halo 5 sub forum for this sort of feedback.