The Nikon M-223 2.5-10x40 Laser IRT w/ BDC 600 Reticle improves your speed, accuracy and range like no other scope. The Nikon M-223 2.5-10x40mm Riflescope features Immediate Ranging Technology, combining two facets ofNikoninnovation withthe quick precision of Nikon rangefinders with the pinpoint accuracy of Nikon riflescopes. The Nikon M-223 2.5-10x40 Waterproof Riflescope utilizes Nikon IRT technology for immediate ranging power in an innovativeRiflescope; plus a the BDC 600 reticle is trajectory compensating, allowing you to quick aim while factoring various known shooting distances from 100 to 600 yards. This state-of-the-art Nikon M-223 2.5-10x40 Laser IRT Rifle Scope with one-touch laser technology opens a whole new avenue in your hunting capability.