SNIPER&reg; Tactical Smart Polymer Picatinny Rear Flip Up Backup Flattop Sight Green Sniper Smart Polymer Rear Flip-up Sight / Green Polymer Precision Windage and Elevation Adjustments Clever and Robust Flip-up Posi-Lock, designed to guarantee holding zero Dual Aiming Apertures / Lightweight and durable, 1" Height Install, and maneuver in little time and with ease, as you move about your targets