[mountainlion]

.the media will call them cop-killer bullets

I think a ballistic vest will easily stop them as they would fragment quickly.

[uncommonsense]

"I think a ballistic vest will easily stop them as they would fragment quickly"

They're awfully sharp. Looks like they penetrate well, then decelerate.

[usurper]

I think a ballistic vest will easily stop them as they would fragment quickly.

That would be good for perspective marking. No one buys more ammo than LEOs and LEOs don't like rounds that go through their vests.

In close quarter combat like room clearing you don't want a round that can go through dry wall and your partners vest who is clearing the next room.

[Vaquero]

maybe....maybe vest will work

vests can be cut with knives....and this thing looks like a bunch of knives...

[PowderMonkey]

Yup. deadly on fresh fruit, water balloons, and gelatin, but let's see how it handles penetration of heavy leather jackets or denim, and things like car doors/windows, tree limbs/foliage (general concealment). Frangibles have their place, but I'm sold on the .45 ACP in 230 grs. I worked with an armorer some time ago providing ballistic protection for vehicles. The .45 round absolutely mauled the ballistic aluminum plate inserts of the door panels.

[catnipman]

“I think a ballistic vest will easily stop them as they would fragment quickly. “

Maybe not. The video claims their teeth work like a spinning hole saw, drilling trough the first obstacle before they lose their energy and fragment.