This 3x Tactical Magnifier is designed for use along with holographic, collimated reflex, and other compatible weapons sights, to increase the magnification of the accompanying sight for greater sighting range, and improve target recognition, especially at shorter-range distances. The 3x tactical magnifier features multi-coated optics and is waterproof, fogproof and shockproof. It is 117mm x 40mm x 40mm, and is compatible with EOTech and Aimpoint.