yea windows are stuck shut...cant use them... and all of the doors, battery, floor, pilars, gas tank, are fitted with light bullet proofe material, something like kevlar, but with a higher armoring...
heres the website of the glass so that you guys get an idea of how it goes..
http://www.agpglass.com/agp-bullet-standards1.htm
http://www.agpglass.com/agp-tech-steelplus1.htm
http://www.agpglass.com/agp-tech-solarplus1.htm