He needed to dress a hog carcass in that padded uniform or at least ballistic gel. That guy is pretty good, he has good videos. Russian I believe. I think all that about the M2 carbine not dropping Reds was simply the issues with .30 carbine and its stopping power generally. Those Reds would go off and die later, but that adrenaline was carrying them a bit. The only things that will reliably one shot stop (other than AAA or something like that) are basically a .50 cal and perhaps 00 buck close. Other than that, some people just tend to continue running about, unconvinced that they are, in fact, dead.