Vortex Diamondback HP 4-16x42 Riflescope w/ Dead-Hold BDC Reticle (MOA) DBK-10019 is a top choice of discerning hunters. Its performance is powered by features like 4x zoom range, XD extra-low dispersion glass, XR fully multi-coated lenses and side focus / parallax adjustment. While XD glass enhances resolution and color fidelity, XR lenses increase shooting light to the greatest possible amount. The side focus / parallax adjustment can be accessed with ease, without disturbing the scope’s trim profile or optimal mounting height. The scope’s 4x zoom range makes it suitable for versatile magnification configurations and pairing up with a diverse array of weapons and applications. Vortex DBK-10019 is rounded off with argon gas purging, o-ring, capped reset turret, 1 inch tube, second focal plane, 4 inch eye relief, 23.8-6.1' field of view (at 100 yards), and a Dead-Hold BDC reticle that is equipped with a customized dot design to negate guesswork on holdover and windage corrections at varying ranges. Features of Vortex Diamond HP 4-16x42 DBK-10019:XD Lens Elements with Extra-low dispersion (XD) glassXR Fully Multi-Coated lensesSecond Focal Plane Reticle1-inch, single-piece, hard-anodized aircraft-grade aluminum tubeCapped Reset TurretsSide FocusArgon gas purging and O-ringVortex DBK-10019 Specifications: Vortex Diamondback HP 4-16x42 Dead-Hold BDC Riflescope DBK-10019