Bullet proof glasses are fitted by layers of B.P. RESISTANT FLUID to get the protection against the fires of AK-47/SLR7.62/9MM/REVOLVER/CARBINE
from a distance of 10 mtrs. .
SPECIAL LAMINATED GLASS can also be provided using
POLYCARBONATE CORE OR 200-400 MICRON,transparent film that catches the glass and the bullet fragments.
As you know,even a small fragments of flying glass can cause considerable damage.