Take no credit for the video myself all credit goes to the uploader, the addendums r my own views.
This is for a stamina kill.
Wait till he turns away b4 u get up and try to throw ur stun grenade in front of him.
Oh and for whatever reason shooting him with any gun while he is stunned results in stamina kill.
If u dont get him as quickly as the vid shows(i didnt) tranq him as much as possible. Then when he comes down to feed stun grenade him and ak the feaky bastard(make sure he is stunned).
I know the video is super fast but it does work.