I have a long standing grudge against AR pistols, perhaps unfairly. When I was a kid (not terribly long ago), someone handed me one to shoot. For a reason that I can only speculate on, it didn't have a front sight. I tried to compensate by holding it close to my face, and aiming along the top like a shotgun. I was raised to believe PPE of any sort was black magic and not to be fooled with. That gun taught me that advice was in the same category as manure and dung. I took one or two shots, and my ears rang for the next two hours. Good times... Good times.