A mod adding numerous features from the MMOFPS Planetside 2 by Daybreak Game Company
A picture of all the Havoc squad helmets in-game (minus the infiltrator)
I'll list the helmet names and the unit they're attached to as "helmet name (unit)"
From left to right:
Cavalry (Light Assault)
Support (Combat Engineer)
Frontline (Heavy Assault)
Medic (Combat Medic)
You can also see the new engineer backpack on the left and the new medic backpack on the right.