Most Important Advanced Unlock:
Pilum H-ARV
Think of the Pilum H-ARV as a mid ranged sniper rifle that packs a punch hard enough to take out tanks. Unlike the standard anti-vehicular weapons, the Pilum H-ARV doesn’t have a projectile guidance system, but it makes up for this with its high speed shots. The gun has a small delay when fired, so if your enemy is at a mid/long distance from you, ensure that you fire a little ahead of them. The ideal range for this gun is between mid and close, where the delay is minimal and shots are most accurate. Just disable a tank using your EMP mines, get to its backside and plant a shot on its soft behind. In just one shot, you’ll get rid of the tank and everyone in it!
Aiming with the Pilum is slightly harder than most other weapons. The trick is that all shots land in the larger circle of the crosshairs. It might go higher or lower within the circle randomly, so ensure that your target covers as much of your crosshair as possible. Practice a little, you’re sure to get a feel of how this weapon works; once you learn how to use this baby, enemy vehicles will go down like flies.
excellent 
