This past weekend I was fortunate enough to be able to shoot at some bullet resistant glass that my friend had acquired for testing. I don't know anything about what type, what rating, or anything else other than it was heavy and consisted of 5 pieces of glass sandwiched between an adhesive laminate.
Here's the 2x3 foot chunk of glass as it was presented to me before being shot at. It was left over from a bank construction job.
|Each panel of glass was about 1/4 inch thick. There were 5 panels sandwiched together.|
|2 hits from .45 acp at 30 yards|
Next I tried some M855. Being that this was a pistol range, I used my AR pistol.
|M855 62 grain steel core penetrator|
|M855 in center and top center|
The projectile was stopped within the glass but caused the last layer to shatter and spall. So the round broke the glass all the way through the 5 layers but didn't pass through.
|Back side after being hit with M855|
The top shot at the edge appeared to be defeated at first glance.
|M855 at top edge|
|edge of glass as seen from top after M855 strike. (not my shoe)|
H/T to Kelly for providing the glass.