BulletSafe makes bullet proof vests out of Troy, MI. Tom tests his vest against a Desert Eagle .50AE and repeats the test against his own version of the Box O’Truth. His box has 24 layers of drywall. I am not sure what he is trying to prove with the drywall as many of us know that drywall is not remotely bullet resistant.
For more information check out BulletSafe.
They have plenty more demo videos on their website showing the capabilities of their vests.