Go Jerry!
I mean, ideally you wouldn't be taking 400 rounds to the chest. The vest absorbs and redistributes the energy of all handgun cartridges with relative ease, those aren't getting even close to penetration with FRAS level protection hence it took 400+ 9mm rounds out of a god damn gatling gun; a few AR/AK rifle rounds would probably crack your ribs and definitely be a hospital trip at best, but you likely survive. If you meant that even if it stopped a 50 BMG then yeah, you're done regardless.
#Mindblowing
It got some great shine in Rambo too. <45>
A defining symbol of American ingenuity and liberty.