The WRGS sight comes standard on the X7. This peep on the rifle i have been using during our muzzle loader season has been reliable. I guess one could write it is 100% reliable; it has never failed. However, it is mounted a way back at the end of the barrel on the X7, and that is where i use it. It works there. There is nothing fancy about it. Adjustments require patience, and attention to detail. There are no 'clicks'. One loosens screws and the sight is 'free'. Time will tell, but as i write this, i may prefer the wgrs to the fp i just mounted on the Extreme, and also on the Dream Season. The wgrs is simply simple.