The DYE Izon sight system is a great addition to any marker. If you're all about one-shot one-kill, or for those people who want to be a dead-eye-dick, this sight is the answer. Just throw it on your gun, dial it in and play. Put the red dot right on someone's goggles and get ready to feel the satisfaction when you pull the trigger. Of course you're going to need a good paint and a great barrel. With the Izon sight there are no batteries to drain, all you need is some sun on your gun and you're ready to one-shot just about anything that gets in your way.