The Yukon Advanced Optics FF19020 3x Tactical Magnifier is designed for use along with holographic, collimated reflex, and other compatible weapons sights, and increases the magnification of the accompanying sight by threefold. Suitable for medium range distances, the tactical magnifier helps for quick target acquisition by allowing you to precisely recognize and zero in on your intended target. The 3x tactical magnifier features multi-coated optics and offers diopter adjustment.