S!
As of a shell casing hitting a windscreen. Sure it would not penetrate the screen but if the windscreen, armored or not, is hit by multiple objects the dents or marks alone can call for a replacement as pilot's view will be affected by the damage. A shell casing has a mass and with enough speed hitting an object moving at speed as well there will happen something, not just a ping. If you work with airplanes, you would know that a surprisingly small object can cause damage on the airplane
Well, the update was nice as stated. Waiting for more in future
