Ever since the DPMS pins started walking out. I wasn't feeling to happy about my AR15. I read about these pins prior to having the pins walk out, but figured if I don't need them, I won't bother with them. When it first happened it caught me off guard. I thought the firearm was on safety. I peek over and see that it's not and notice both pins falling out. As soon as I got home from the range I was on the internet pricing some KNS Anti-rotational pins and had ordered them shortly after. I watched a couple Youtube videos and some people were having a hard time with the installation. I guess my pins were pretty loose and that's why I was having the problem. I pushed both pins right in and tightened up the hex screws. I think it provides a visually aesthetic look to the AR.