Pro Mag M16/AR15 Flip Up Single Plane Dual Rear Sight Black

This rear sight attaches to AR-15/M16 flat top A3 upper receivers. The sight may be used as a back-up rear sight or a lightweight rear sight to co-witness with red dot or holographic sights. The sight locks in its upright position, a spring loaded release must be depressed to place the sight in the down position.