Just remember, your sights are ABOVE that hole where the bullets come out. I have seen one shooter put a 5.56 round through a piece of angle-iron at point blank range (ouch) and another shoot a windshield-wiper off a mini-van with a 10mm pistol. Also, I don’t recommend popping your head out of the same location two times in a row. If you have ever done Force-on-force training you learn to put your sights on the spot the last place you took fire from and more often than not, you can get a head-shot within a second or two. Food for thought.