Nikon

BDC 600 Reticle: Developed specifically for the trajectory of the .223 Rem /5.56 NATO round with 55-grain polymer tip bullet the BDC 600 reticle offers shooters unique open circle aiming points and hash marks from 100 to 600 yards. - 100-yard Parallax Setting: Eliminates parallax for precise shooting. - Precise 1/4-MOA Hand-turn Tactical-Style Turrets: Positive click reticle adjustments get you zeroed in quicker and maintain your settingeven with repeated recoil. - Waterproof/Fogproof: Nitrogen filled and O-ring sealed. Fully Multicoated Optical System: Provides up to 98% light transmission and maximum brightness from dawn to dusk. - Generous Consistent Eye Relief: Keeps your brow safeeven with the heaviest recoiling cartridges lightweight rifles and severe shooting angles. - Zero-Reset Turret Feature: To simplify field adjustments Nikon has integrated this feature into all new riflescopes. Just sight-in as usual then lift the spring-loaded adjustment knob rotate to your zero and reengage. Field adjustments are now as simple as dialing-in your subsequent ranges. - Magnification: 3 -9 x - Objective Diameter: 40 mm - Exit Pupil: 4.4 -13.3 mm - Field of View: 11.3 -33.8 ft @ 100 yds - Tube Diameter: 1 in - Eye Relief: 3.6 in - Eyepiece Outside Diameter: 44 mm - Weight: 17.1 oz - Overall Length: 12.4 in - Adjustment Graduation: 1/4 in - Max Internal Adjustment: 80 MOA - Parallax Setting: 100 yds - Use: Centerfire Short/Mid Range AR (Modern Sporting Rifle)