>>12533343It's a bit like someone keeps making new bullets, incrementally tweaking the size, shape, the blend of metals used, that kind of stuff. Then they shoot them at you.
OP's asking "well, how do we know that body armor you made will keep stopping them?" and the response is "the bullet's changes are incremental, the muzzle velocity's not changing a ton, they're not switching from hollow point to FMJ, and they're not suddenly changing from 9mm to, like, tank shells. The likeliest-but-still-rare worst case is that you'll feel serious bruising instead of regular bruising."
