Composite metal foams are being developed for use in ballistic armor because of their light weight and high impact energy absorption capabilities. This particular layered design absorbed 60-70% of the total kinetic energy of the projectile (7.62x63 mm M2 Armor Piercing) with less depth penetration and backplate deformation than the standards defined by the U.S. National Institute of Justice. The redirection of the kinetic energy results in the bullet shattering into pieces upon impact on the surface.
Source: https://youtu.be/lWmFu-_54fI
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