Careful work at the range is only worth doing if the scope keeps it. The Thrive X 4-16x50mm is made to hold a zero you have taken trouble over, with turrets that run capped or uncapped as the situation asks. Parallax adjustment from 10 yards to infinity brings the target image onto the same plane as the reticle. At 16x that matters more than most shooters expect, because magnification enlarges a small error in head position along with the image itself. Shooting at distance rewards the people who did the work beforehand, and it is not generous to anyone else. The 4-16x50 is built for the first group, and built to still be worth having once the work is done. 30mm 6061-T6 Aluminum Maintube 50mm Objective Lens 0.25 MOA Turret Click Value 28.1 Foot Field At 4x ZeroTech Triple-A Lifetime Warranty