The Phenomenon of Modern Guns

My age is classified in the category of Senior. Does that by itself suggest anything about my understanding of modern guns? No, it does not. Just checking for any preconceived bias. By chance I have owned guns in one form or another for about 35 years. In 1976 I shot Marksman on a police combat course with a four inch stainless steel Ruger Security Six 357 Magnum. That was a mouthful, but it points out that modern guns are very different than the arms defined in the 2nd Amendment. And that was 35 years ago. Modern guns of the 21st Century are just plain scary.