Advanced fully multi-coated glass gives you better light transmission with optimum brightness and true color across the entire light spectrum; Precision zero stop system allows you to return to your initial zero position with a sharp and precise stop, right on your initial zero; Locking turrets allows you to pull up on your turret to dial and push down on the turret to lock it in place to avoid inadvertent adjustments; XPL protective coating gives you extra protection on the exterior lenses to prevent the scope from enduring dirt, oil, and potential scratches; Regardless of how heavy the rain is coming down or an accidental drop in the water, the optics will remain waterproof and shockproof; Reticle etched on the glass provides excellent backing support for complex reticle design and offers great durability and much higher shock resistance to recoil; Aircraft-grade aluminum tube provides durability and long service life