Penetrator

Penetrator is a perk in Fallout 4.

Effects
This perk allows one to target their opponent's body parts even if they are behind cover, allowing them to shoot through solid objects and hitting the body part that they were aiming for. This is very useful against enemies like robots and people in power armor, because they generally have their fusion cores or combat inhibitors on their backs. With this perk it actually allows one to target their weak spots, through their body, meaning that even if they are facing towards the player character, it is still possible to hit exactly where wanted, such as fusion core. At least some portion of the enemy must be visible to be able to target them in VATS, if they are completely behind cover and hidden, one will be unable to target them.