Monstrum Tactical 1.5-4x24 Rifle Scope with Rangefinder Reticle Tactical rifle scope providing crystal clear targeting at 1.5-4x magnification, with a 24mm objective diameter and an eye relief of 3.5-3.8 Inches Glass rangefinder reticle for on-the-fly range estimation and long distance targeting Dial controlled reticle illumination in both red and green with multiple brightness intensities Aircraft grade aluminum construction with a 30mm sealed, nitrogen charged tube for resistance to water and fog Please note that mounting of the scope requires 30mm scope rings to mount and that these are not included with purchase