Do you absolutely, positively need to kill everything within 60 feet and still have half of your drum mag left over? Pick up the SAW and listen to the salt.
Seventy-two rounds of pure, unadulterated death to campaign enemies and other players alike, this bullet hose was one of the easiest weapons to use, and the Halo 4 version takes the cake simply because that's where we first saw it used.
More importantly, it is consistent. You might have headshot capabilities in Halo 5, but there was always a chance you could miss and need that one extra bullet to finish the job. Not in the SAW's original iteration. Thirteen rounds. That was it. That was a kill. And if you managed to pick up any additional ammo, heaven help that poor, dead enemy team.