That still doesn't really make sense. Most Fallen enemies have protected heads, but we can still shoot them off with no problem. It's not meant to be on the neck, else they would have a different animation when being shot in the neck -other than losing their heads (like how the Vex break in half when you get a precision kill on them) I've had some instances where shooting up and to the left or right of their heads will work too, but every time I aim directly into their head, it doesn't work. It's like their precision hitbox is a donut around their head. They just really need to fix their hit boxes.

Nothing to fix. Working as intended. As other guy posted, splicer vandals have extra head armour. Aim for base of neck for critical hit.

Not that I'm saying you guys are wrong, but is there any confirmed source for this (I.E. a grimoire entry that states that their heads were heavily armored, but the neck was more vulnerable -or a statement from Bungie regarding their weak points.) Otherwise, this all just sounds like conjecture from the PNN. Like I said, realistically, most of our enemies have armored heads (I mean, have you SEEN a knight without its helmet?) If we can score a precision hit on these obviously more-heavily-armored heads, why are these Splicer Vandals a different story? If you do have a source, please let me know. I would very much like to read up on this.