Combine 100 years of optical ingenuity with the superior glass and innovative materials and you have the Nikon® M-TACTICAL .223 4-16x42mm Rifle Scope. The multi-coated optical system reduces reflection to maximize light transmission, brightness and contrast. The platform-based BDC-600 reticle features open-circle aiming points and hash marks from 100 to 600 yards. Paired with spring-loaded windage and elevation knobs with instant zero-reset and directional indicators you get an easy method for performing in-the-field adjustments. The 30mm aircraft grade aluminum tube with Type-III hard anodized finish provides shockproof construction shrugs off the recoil of hard hitting calibers.