Monstrum Tactical 1.5-4x Tactical Rifle Scope with Range Finder Reticle and One-Piece Offset Mount 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 Includes 30mm offset Cantilever dual ring mount with integrated top rails Aircraft grade aluminum construction with a 30mm sealed, nitrogen charged tube for resistance to water and fog