The EOTech Vudu 3.5-18x provides a robust 34 mm tube, XC High-Density glass, and is loaded with other performance features required to take that precise long-range shot. The oversized and precision-machined turrets, with EZ Chek zero stop feature, let you quickly dial adjustments and return to zero, even in low-light conditions. The side-mounted parallax adjustment allows you to dial the reticle focus in for the most difficult long-range shots.