The XPF 10-40X50mm scope with Locking Turrets features a Dual-Illuminated Rangefinder reticle and a side parallax turret. This scope is ideal for long range competitive shooters, target shooters, and hunters.The large thirty millimeter main tube is one piece aircraft aluminum. The scope has a large fifty millimeter objective for greater light gathering capabilities and is adjustable from ten to forty power. It features both green and red Mil- Dot reticles and rheostat switch to control the level of brightness. Windage and elevation knobs are both large easy to adjust with audible clicks and are both lockable. One eight minute of angle adjustment and a generous two and a half to three and a half inches of adjustable eye relief.