You shouldn't have to "baby" your long-range riflescope. That's why we made the Tenmile line. It's built to take a beating and maintain your zero. And when you want to push farther out, its excellent light transmission, user-selectable LED illumination and crisp, precise adjustments give you the precision you need to make the hit. The Tenmile 4-24x50 features premium glass coatings, a second focal plane MRAD Ranging reticle with daylight bright illumination, and exposed zero stop elevation adjuster. Features: Pinpoint aiming in any condition - models feature options for precise milling or holdover reticles available in first or second focal plane for ensured accuracy Edge-to-edge clarity - fully multi-coated, broadband, anti-reflective glass provides excellent light transmission, true detail and color with zero distortion Increased adjuster range - 30mm tube offers increased adjuster range and durability Ultra durable for ensured reliability - aircraft-grade aluminum and ruggedized design engineered to withstand extreme conditions and tested to military standards and protocols Quick and easy adjustments - crisp, precise, windage/elevation adjusters require no tools, capped or zero stop adjusters ensure no accidental shift Confident aiming in any light - user-selectable led brightness settings with an "off" in between each setting to adapt to any environment Optimal flexibility - generous windage and elevation adjustment for maximum total travel Repositionable magnification lever - accommodates different shooting positions and rifle configurations 10 illumination settings Led illumination source Second focal plane 68 hr battery life