Currently 1.5-5% carbon nanotubes can be used improve protection against bullets by 20-50%. This is described in this patent for Lockheed Martin
There is also work to use carbon nanotubes to enhance the protection of E-glass.
Applied Nanotech Holdings will be presenting its work with carbon nanotubes and E-glass at the Army Science Conference.
Here is 38 pages of previous work on hybrid e-glass and carbon nanotubes for ballistic protection
They are trying to improve protection and lower the weight needed for the same level of protection.
If you liked this article, please give it a quick review on Reddit, or StumbleUpon. Thanks
How to Make Money