AR15/M16 Rifle Picatinny/Wearer Rail Iron Buis Rear Sight
Rail type：Picatinny/Weaver ，Lenght:2.7"，Weight：4.2, Material: High Quality Aluminum.Thumb nut with locking retention,precision elevation ajustments to enhance shooting accurcy，can work with  AR15/M16 Flip Up Front Sight ,Windge/Weaver adjustments ,