For many Call of Duty players, the "Overkill" perk is a game-changer, allowing them to carry two primary weapons into battle. The ability to switch between, say, a long-range sniper and a close-quarters SMG without needing a pistol is invaluable. But as you progress through the ranks and hit Prestige in Call of Duty: Black Ops 6, you might wonder if you have to unlock it every single time. The...