Equip last word right before you're about to win to gain a free 3% The gun has to be your primary to count for points. It does not have to be out when you get the kill. Equip the gun once you get heavy ammo. Unequip when you die or run out of heavy ammo. Equip the gun when you are on kill 4. The 5th kill gives you a 5 kill streak. If your last word is equipped for that 5th kill, it's a huge % boost.