Okay kids, run, dont walk, to: http://www.theboxotruth.com/ to see a guy shooting various guns into bulletproof glass, body armour, sandbags, doors, padlocks, etc, etc. to see what does and doesnt do the trick. Extremely eye-opening … esp. the glass and the sandbags.
http://www.theboxotruth.com/docs/edu9.htm
::dies laughing::