I know that and I have a heavy duty Buddybar under the door knob that prevents the door being kicked open. Most of these bars are light and cheap, but this one is made like a tank. The door won't be kicked open without a bunch of trying. A person would have to kick and kick and kick and I would hear that. I also put a vibration door stop under the door and it screams if that door moves any at all.
An FBI report says most burglars get in by kicking open the door. When I read that, I looked for this heavy duty bar and bought it.
My house is brick.
Brick doesn’t stop bullets. It provides some protection from high angle shots but repeated impacts will shatter the brick even with those.
There’s better videos but this shows what happens to brick.
http://www.youtube.com/watch?v=bw9STw0BKgM
In short they offer very little protection from bullets, especially rifle rounds.