Sightron Scope STAC 4-20X50 MH Fast Focus Eyebell: Allows for quick and easy adjustments when in the field. - Target Turret: Precision adjustable target turret in 1/4 MOA adjustments. All models are resettable to zero and are protected by rugged windage and elevation caps. - Zoom Ring Lever: A pop up style zoom ring lever for ease of use in cold weather climates. - Lifetime Warranty: We are so confident in the quality of our products that Sightron offers a Lifetime Warranty. - ExacTrack: This scope features Sightron’s unique ExacTrack windage and elevation adjustment system. No other system on the market comes close to the precision and performance of ExacTrack. - Zact-7 Revcoat® Multi-Coating: Sightron’s Zact-7 Revcoat® employs revolutionary lens coating technology featuring fully multi-coated precision ground glass. - Waterproof: Rain snow or humidity Sightron optics are built using 100% sealed system ensuring a lifetime of performance in the most extreme environmental conditions. - Shockproof: Rated for recoil and impact from even the toughest loads. - Nitrogen Gas Charged: Nitrogen filled to provide a lifetime of use from fogging and internal water buildup. - Magnification: 4-20X - Object Diameter (mm): 50 - Fov (ft@100 Yds.): 23.6-4.4 - Eye Relief (in.): 3.7-4.0 - Reticle Type: Duplex - Click Value (@100 Yds.): 1/4 MOA - Minutes Per Revolution: 15 MOA - W/E Travel (@100 Yds.): 40/80 MOA - Knob Style: Target (Resettable) - Focus Type: Side Focus - Parallax Range: 9yds to Infinity - Finish: Matte Black - Waterproof: Yes - Fully Multi Coated: Yes (Zact-7 TM 7-Layer) - Weight (oz.): 23.6 - Length (in.): 14.8 - Tube Diameter: 30mm