So, I had the fixed pistol grip stock on mine when I got it and the LOP on it is well, long. I changed it out with the field stock, which I currently have on my M4 and as weird as it sounds it is a world of difference. The measurements or LOP or technically the same, but the field stock feels much much shorter. I don't know why and I'm sure there is some better explanation as to why, probably has something to do with the pistol grip itself, but it feels a lot shorter and just feels overall better. I love the field stock and will keep it on my M4 for the foreseeable future unless Magpul or some other company makes a better field stock. I have no intention of going back to the pistol grip. But others might say differently.