The Burris Xtreme Tactical 5-25x50mm Rifle Scope is designed for serious shooters looking to amp up their accuracy when taking long distance shots on target. Features premium optical glass that boosts light transmission and reduces glare to produce a crystal clear sight picture. Designed for serious, technical, long-range precision rifle shooters both tactical and competitive Front focal plane reticle design allows the reticle size to increase or decrease as magnification is increased or decreased; trajectory compensation is always correct and proportional for the selected power setting; also called first focal plane or FFP Ergonomic side focus and easy-to-reach parallax adjustment from 50 yds. to infinity, for improved accuracy at long distances Excellent resolution optics and tactical-appropriate reticles and adjustment knobs make it easier to identify targets and adjust for windage and elevation Versatile 5-times zoom system allows for a larger field of view at close ranges and better target acquisition at long ranges Zero Click Stop adjustment knobs let you quickly and easily revert back to the original yardage setting without counting clicks Advanced windage and elevation adjustments are fast and easy; accurate and repeatable reticle adjustments match the measurement system of the reticle High-grade optical glass provides excellent brightness and clarity with lasting durability Index-matched Hi-Lume multicoating aids in low-light performance and glare elimination, increasing your success rate Illuminated reticle reduces time to get on target in any lighting condition and dramatically increases accuracy when target is dark 11 brightness settings (spanning night vision, low light, and daytime), with a convenient battery-saver position between each setting Triple internal spring-tension system allows the scope to hold zero through shock, recoil, and vibrations Nitrogen-filled body tubes prevent internal fogging in the cold and rain Precision-gauged and hand-fitted internal assemblies maintain a consistent point of impact through the magnification range, regardless of shock and vibration Solid, 1-piece outer tube is stress-free and durable; withstands shock and vibration from even the heaviest-recoiling calibers