This state-of-the-art reticle has cascading windage and elevation dots, so you can execute long-range shots out to 500 yards in still or windy conditions. Superb optical glass is precision ground. The lenses are multi-coated for glare resistance and maximum efficiency in low-light hunting conditions. The Fullfield E1 3-9x50mm riflescope has a sleek profile. It features upgraded windage and elevation knobs. And the separated power ring and eyepiece accepts flip-up lens caps. The scope is housed in a 1-piece, stress-free tube. Its internal assembly is double spring-tensioned for shockproofing. The riflescope is resistant to a lifetime of field use, heavy recoil, and harsh vibration. It is protected by the Burris Forever .