I am interested in what will stop rounds from penetrating walls. Here is a web site showing what will not: http://www.theboxotruth.com/docs/bot1.htm (Cut and paste it to go there). Sheet rock will not stop any thing. It’s kind of scary. If someone with a rifle or pistol is standing at the window of my house there are few places I would be safe.
I would want to shoot back and try to get them away from the window or if I cannot get to a weapon try to put enough distance between us.
Buy guns and shoot back