Burris Droptine(TM) 3-9x40mm Riflescope The Burris Droptine riflescope is a reliable, affordable, and top performing hunting optic. It features high-grade optical glass for excellent brightness and clarity with Hi-Lume multicoating to prevent glare. The quality precision-ground lenses are larger than most comparable scopes for better light collection. Field adjustments are a breeze with the no-slip grip integrated-eyepiece design. The Droptine scope is waterproof, fogproof, and shock resistant to provide long lasting durability and excellent performance in even the most extreme conditions.