Burris has gone to extremes to engineer the ultimate in high-performance optics ? XTR Xtreme Tactical Riflescopes. Extra-large, ultra-premium lenses produce unsurpassed resolution, clarity, and brightness. Index-matched HiLume multicoating boosts clarity and, enhanced with new StormCoat?, causes water to bead and shed off for a clearer view when water drops are present. Outer tube walls are 25% thicker for 42% greater strength. Double-force coil spring suspension locks the inner tube in place for unfailing accuracy. XTRs also feature side turret-mounted parallax adjustment systems. LRS models have a fully integrated side turret-mounted illumination system. The new 1X-4X XTR ? equipped with the innovative XTR Ballistic 5.56 Reticle ? represents the state of the art in tactical optics. The whole package is waterproof, fogproof, shockproof and warranted forever. Tactical scopes just don?t come any better. SPECIFICATIONS: Power/ Obj Lens: 6-24x50 Reticle: Fine Plex Finish: Matte Features: Target Knobs, Side Parallax Field of View (ft@100 ft.): 19 - 5.3 Exit Pupil (mm): 8.3 - 2.1 Click Value (in @ 100yds): Elevation - 0.25 MOA, Windage - 0.25 MOA Max Adj. (in @ 100yds): 79E, 29W Eye Relief (in): 3.2 - 3.7 Length (in): 16.5 Weight (oz): 26