The 4-14x Tactical rifle scope is the ultimate instrument for sporting and long range shooting. Its airtight, nitrogen-filled construction allows it to operate in temperatures ranging from -40° to +140° F. Its features include: Photo engraved rangefinding reticle Full multicoating and anti-reflection treatment eliminating glare and maximizing light transmission One piece "O" ring sealed and nitrogen filled alloy housing 30mm tube diameter Side focus from 50m to infinity Finger-adjustable knobs Waterproof Fogproof Shockproof (even when employed on a .50 cal. rifle) High resolution optic system Magnum lock support system on reticle Superior optical glass by Schott Glasswerk, Germany Technical Data Magnification 4-14x Objective diameter 50mm Field of view at 100 yards 34-11 feet Exit pupil diameter 13-4.2mm Eye relief 3.75 inches Diopter adjustment -4 to +4 DPT Reticle adjustment range 82 max. MOA Click adjustment 1/4 MOA Tube diameter 30mm Length 15 inches Weight 24 oz.