User blog comment:So-Pro Warrior/Mass Effect Tournament Round 1 Battle 4: Garrus Vakarian vs. Sev/@comment-143604-20120529003428/@comment-4541447-20120529004651

Because that way he has a weapon for Melee and using the guns used in ME1 they would have an Infinite amount of ammo and only overheat that would make it unfair for the other guns.