They have close ties with AGP a company that specializes in high tech glass, the model X windshield is one of the most complex in the industry. AGP also special

They have close ties with AGP a company that specializes in high tech glass, the model X windshield is one of the most complex in the industry. AGP also specializes in bullet resistant glass and use many of their techniques in regular glass as well. I believe what musk said, they threw wrenches, a kitchen sink, just about Avery thing and it didn’t break. A metal ball is probably the worst case scenario. A solid ball will be very heavy, but even worse, there is only ONE point of contact. All the kinematic energy has to be stopped at ONE incredibly small point. What is the area of contact? It’s infinitesimally small! Even a bullet would have more contact area, and suffer plastic deformation. A metal sphere? Worst case scenario.