The composite laminate consists of fiberglass reinforced thermoset resin designed to defeat a projectile through a process of energy absorption through controlled delamination and energy dissipation. The fiberglass reinforcement transfers the energy of the bullet across the width of the panel. In addition, the resin is designed to separate into individual plies through a process of controlled delamination to eventually absorb all the energy and stop the bullet within the laminate. Once the plies have begun to delaminate, additional shots become progressively easier to defeat because the energy is more readily absorbed by the laminate. In contrast to metal barriers, the fiberglass laminate is designed to prevent ricochet of the projectile as well as spalling on the non-threat side of the panel. An example of ArmorCore® test results and be viewed HERE.
Here is an un-official video showing testing of ArmorCore® Level 4 and Level 7 vs an AR-15. ArmorCore VIDEO. As can be seen, the level 7 is able to stop multiple rounds from an AR-15. We use an even higher grade level 8 in our Assault-Rifle Bullet Resistant School Desks.
ArmorCore® Level 8 bullet resitant panels are UL tested and shown to be able to stop five, high power 150 grain .308 lead cored full metal jacket rounds shot with a minimum velocity of 2750 feet per second into a 4.5 square inch area with no penetration (see below).
5 Shot Test Pattern Used in Armorcore® Level 8 Testing