PERK3 IMPATTO PROFONDO

Normally, a machine gun has the power shoot through wooden floors, plaster walls, and even some fairly thick stone walls, but a weapon like an M4 does not. Or not as much. Use this perk to be able to shoot through walls with any weapon. Using this perk I advise shooting at walls and seeing if you get a white crosshair pop up indicating you hit someone, if it does, keep firing at the wall and you will kill the enemy without ever even seeing them. Note: Deep Impact does not add to bullet damage, it only lessens the damage penalty of a bullet that goes through a wall or other barrier.

Another great perk, I love this one for camp sniping. If there’s people hiding from you behind walls, then they’re screwed, there’s no place to hide. Great for any class really, you don’t have to worry about turning that corner and being at the mercy of the people camping around it. Especially great for LMG’s, spray a wall and watch the kill count go up, up, up.
This perk is available by default.