There was some technology show on the discovery channel (I love that channel!) a while back that got on this subject, some new laminated glass and lexan hybrid that was amazing. They shot a it with 2 full mags from an mp5 on full auto at about 10 feet, it just absorbed the bullets, and I don't think any penetrated more than halfway through the 3/4" glass thick pane. Then they shot it with a .308, same thing, but it bulged the backside a bit. Then they had a guy hack at the piece that the mp5 shot with a fireaxe, he got through it after 7 or 8 whacks, but only enough to get a hand through, which would shred your digits if you tried, I think. They said the lamination was designed to separate and absorb the kinetic energy of the bullet, which it did handily. I was wondering how effective a trauma plate of this stuff would be.