My friend Pighelmet sent me an IM on AR15.com saying, "Hey O_P, I've got some bullet resistant glass. Wonder if it will really stop bullets? Want to shoot it? I will send it to you."

The only answer was, "Sure! Why not?"

The material is called Polycast, cast acrylic sheet. It is clear and 1 1/4 inches thick. The sheet was approximately 20" X 14"

Of course, you give up something for this protection. In this case you accept the penalty of weight.

This sample weighs almost 25 pounds.

It's not a laminated type of glass but a type of plastic.
I found the properties listed on this website.

Its uses include: "Aircraft manufacturers use Polycast sheet in jets and helicopters. Bullet-resisting Polycast sheet helps solve security problems for banks and stores."

The challenging question for today is: "How "bullet-resistant" is bullet-resistant Polycast sheeting?"

I built a frame for it as this is required for the glass to work as directed.

We shot from approximately 50 feet.

First we shot it with a .22 LR rifle.

It just made a little crack-type mark on the glass.

Then with a 9mm 115 gr. Ball.

Shot it with my Beretta 92FS, as is in current use in the sandbox.

It dimpled the glass, but no effect on the back side.