Flip-up tactical rear sight from UTG includes dual aiming aperture * Dual aiming apertures for all shooting applications; precise windage adjustments * Unique Posi-lock feature prevents tipping; user-friendly locking thumbnut for easy installation * Aluminum construction; accepts both Picatinny and Weaver mounts; 3.4-ounce weight; measures two by 1.9 by 1.3 inches (W x H x D) * Includes limited lifetime manufacturer"s warranty