Originally Posted by qui_gon_glenn
RE: The original question on the post...
DAVIK is INVINCIBLE! Don't waste any time shooting/grenading him - Calo Nord is your real target. Once you get him down to 1hp, the cutscene triggers. Davik dies by coincidence.
I have not verified this through looking at coding, but it has been my experience that focusing on Davik will get you killed, focusing on Calo breezes you through!
You mean invinsible because of armor, etc. Davik isn't invinsible. He just needs the right weapons (the man for the job
EXCEPT OF COURSE:
If you've installed either a mod or an update which could have messed things up.