The Pathfinder hitbox is not accurate, compared to the model

[JamesSpringfield]

The only areas worth aiming at is the chest and head. Shoulders, arms, stomach, waist, legs and feet does not seem to take damage.Close ranged hemlok burst fire only hits with the first round of the burst fire.

[Anlbrd]

All those areas you mentioned other than the hips/upper thighs do take full damage.  There are gaps in the hips/upper thighs.  If you want to know exactly where all the holes are: you can go into training, equip a weapon and start gradually shooting around the pathfinder's body. 

A glaring, major issue is that the hitbox doesn't seem to change for the larger fatboy legendary skins.  You can essentially inflate your model to confuse anyone trying to aim at you because probably 25% of what they're looking at isn't actually anywhere near the hitbox.  The big stupid fins on the wrists of the twitch prime skin for instance.