NcStar MARDRS AR15 Rear A2 Backup Iron Sight Black Dual Aperture for AR-15

The NcStar AR-15 Detachable Rear A2 Iron Back-up Sight (dual aperture) is precision-made with aluminum and steel. The fixed A2 design is adjustable for windage and elevation and it mounts onto Weaver and Picatinny-type rails.