The XTR II 4-20x50 mm riflescope features a 5-times zoom system and 25% thicker tube construction than the original XTR™ Riflescope. The front focal plane reticle design on this and all high-magnification XTR II riflescopes allows the reticle size to increase or decrease as magnification is increased or decreased. Trajectory compensation is always correct and proportional for the selected power setting. This reticle design is also called first focal plane or FFP. It has dimensionally-matched precision adjustment knobs and Zero Click Stop technology. High-performance optics offer Hi-Lume® multi-coated lenses. The lenses optimize target resolution, contrast, and low-light performance. All hand-fitted internal assemblies are triple spring-tensioned for absolute shockproofing, even under severe recoil. They are vibration resistant, even on extended vehicular patrols.