Tactical Low Profile, Iron Flip up Rear Sight - Black Precision made back up flip-up rear sight. Color: Black Fit virtually all Picatinny rails Rear Sight creates a precise optical tunnel that ensures more accurate aiming and faster target acquisition Instant spring-locked deployment mechanism will not slip, break or deform Made of extremely durable high-grade aluminum REAR SIGHT ONLY! Fit virtually all Picatinny rails