That is our model.
Just to clarify - is it Tripmine's AGrunts or just a fanmade model?
Vortigaunts will probably get brand new model and animations. Thanks for feedback we will take a look at this :).
Black Mesa team made a mistake because vorts' default posture is "Idle01" while "ActionIdle" matches much better. I hope you will take this into consideration in your mods
Here are the pics: