With etched reticles and high definition glass, this 6x series of second focal plane scopes bring professional grade features. Designed to accommodate most common shooting distances. the scope features Superior in-class ocular HD glass provides maximum light transmission for brighter, clearer images under low light conditions; solid one-piece black anodized 30 mm body tube, built from aluminum; Argon purged and sealed for maximum fog and water proofing; Zeroable, Locking Windage and Elevation knobs offer audible and tactile adjustments.