Killing is a "banned" word now days in "shooting sports". I haven't shot at anything with a pulse in a long time, nothing against it I just don't. It gives the Anti- something to point at.
So since what we do is pretend when we shoot at paper I have a question for you Jack.
Here is the scenario. (that is what we call it so we don't feel so stupid shooting $50 worth of ammo into a pile of dirt). You wake up at 2 A.M. to Lassie barking from her crate. She doesn't bark if one of the kids gets up to go potty so yo get up to check. You grab your (now here is where I read the rest of your questions) loaded AR (I'll use the one from your first pic only we'll make it a Bushmaster Made right up the road in ME and we'll put a flashlight on it...good for home defense). It has a round chambered and the safety is off, you step into the hallway hit the pulse button on the light and see Lassie is right. There is a guy with a blue bandanna and three teardrop tattoos 22 feet down the hall. You bring the locked and loaded weapon to the fire position and I'll assume you are a right hand shooter, close your left eye and point it at his chest. Remembering that your POA/POI is off because he is so close. You hear a loud noise and the door to your left flies open right next to him. In the next split second you need to decide if it s his partner with a gun, the wind, your 6 year old. Remember you are locked,loaded,off safe and on target...
I think my way is safer.:D
God I love Kennedy jokes!