Let me start by saying - C4 is the absolute best Lethal Equipment. Watch this video >>> Next, I have been having a lot of fun running a class with Overkill Pro. A lot of people think overkill is a useless perk because you can always pick up a dead enemy's weapon when you run low on ammo. However, the chances of picking up the exact gun you want, with the right attachments, are...well its just not going to happen. Primary 1: Gold FAD or Gold ACR w/ silencer & extended mags Primary 2: MSR w/ kick & heartbeat sensor You may be wondering why I chose to use kick on the MSR when you don't really need it for a sniper rifle. ---Watch the video below and you will find out that proficiencies are attached to the player and NOT the gun. Without having to waste an attachment, my FAD or ACR gets the benefits of the kick proficiency on my MSR. So, here is my set up. Primary 1: Gold FAD or Gold ACR w/ silencer & extended mags Primary 2: MSR w/ kick & heartbeat sensor Lethal: C4 Tactical: Flash Perk 1: Blind Eye Perk 2: Overkill Pro Perk 3: Steady Aim Pro Specialist: extreme conditioning pro, assassin pro, marksman pro Here's a clip of me putting all three of them together (C4, ACR, MSR).