Overkill

Overkill lets you have a primary weapon instead of having a pistol. If you have Bandolier, Deep Impact, etc, it will work on both weapons. If you are on last stand you will not pull out your secondary weapon, instead you will pull out a M9 pistol. Most people do not use this perk due to the lack of the famous stopping power and juggernaut. So, players will use one of those perks and pick up the guns left behind from the other dead players. It can however be indispensable for Hardcore games when paired with a sniping rifle and a close range weapon such as a SMG.

Overkill is unlocked at level 38.