NPOA ( Natural Point Of Aim ) I put this together a little over a year ago to use at Appleseed Shoots and our new member orientation class at the Club. I got the laser (green) from DD Ranch at the Saratoga Gun Show it has a button on the rear ( Only taped for now, But it works) mounted on a blank rifle stock. Great for showing new shooters just of much the slight movement of a foot can affect a shot. If it's a inch on the wall at 15 feet it is 3'' at 15 yards and so on and so on! Also works well with breathing!