A friend of mine I work with use to be in military and today he was telling me about this laser thing he had. He gave me a box of military issue blanks for a .223, just cause he had no use. But then he was telling me about the AN/PAQ-4c
http://www.insighttechgear.com/products-paq4c.htm There's a description of it. It has an infrared beam that shoots out and it can only be seen with a set of night vision goggles. He said he has a set setting around somewhere but he'd have to look for the goggles. He asked me if I wanted to buy it from him, but I really have no use. It mounts to a front rail system, and has a button that can hook up to a foregrip. In Kentucky I'm pretty sure night hunting is prohibited, unless you're coon hunting. I didn't know if any of you would be interested in this item or not.