OK, they’re actually bolts, not arrows but c’mon.
The idea of a bullet-tipped arrow (or bolt) is a head-scratcher for me. And as you can see, it propels the haft of the bolt just as much as it does the bullet. The fact that there exist commercially-produced cartridge-holders is even crazier.
We need someone to go all Mythbusters on this to show how effective/ineffective this concept is, with some ballistics media and some super-slo-mo thrown in for good measure.
Judging by the “damage” to the cinder block, it may even be less effective than a regular bolt or arrow. But how will we know until someone sciences that out?
Demolition Ranch has plenty more where that came from, check out their YouTube channel.