4XD™ Extra-low dispersion glass increases resolution and color fidelity, resulting in crisper, sharper images.
4XR™ Fully multi-coated lenses deliver the highest level of light transmission for maximum
brightness.
4ArmorTek® Protects exterior lenses from scratches, oil, and dirt.
DEAD-HOLD BDC MOA
4Argon Gas Argon gas-purged and o-ring-sealed for fogproof and waterproof performance. 4Precision-Force Spring System™
Premium-quality components in the erector-spring system ensure maximum repeatability and ease of adjustment.
4CRS™ Our trademarked Customizable Rotational Stop system prevents the elevation turret from traveling more than one revolution below sight-in zero.
4Magview System
XLR MOA
™
A fiber-optic magnification indicator, combined with raised rearfacing magnification references on the zoom dial, provides fast visual confirmation of magnification from the shooting position in low-light conditions.
4First and Second Focal Plane FFP reticles are located in the front of the erector
tube near the windage and elevation turrets. The main advantage is all subtensions remain consistent at all magnifications. SFP reticles are located within the eyepiece assembly. The main advantage is the reticle size stays consistent at all magnifications.
4Precision-Glide Erector System™ This system ensures the components in the zoom lens mechanism glide smoothly and cleanly through all magnification ranges.