Watch rampage. The move. His helm? Can stop 22-45acp that included 5.56x45 5.56x27 7.62/308 now.... A 50BMG. No. It wouldn't have. Well. Sorta. It would stop it. Mostly. Enough not to go through. But the kinetic transfer would snap your neck. Nonetheless anything short of a 4.50/50BMG sorry not helping. So ya. Dear is fair to imagine thousands of years in the future most guns won't auto kill headshot. Especially if we have the tech today