Nobody is using it except for shits and giggles. I suggest it should be given rampage and kills reload a portion to the magazine. It needs perks to compliment the gun and what it does. If the gun is called sweet business...it needs to deliver.
EDIT: I meant a PvE buff but if it performs well in PvP, then maybe it's a PvP weapon.
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Sweet Business was meant to be played on a Titan. Maybe that's the problem.