as the video suggests, there could be more work done to the sound of guns, to make them more alive, and less samey.
the gun sounds in enlisted could definetly get extra small details such as click before firing on open bolt guns so they sound better, such guns being submachine guns.
another key thing that needs to be done is indoors shooting sounds, they should be much louder and deafening. this video makes a great example of how weapons should sound when shooting indoors