HiViz ARN21 Folding AR Back Up Sight Black Folding for AR-15

The Hi-Viz ARN21 Folding AR Back Up Sight is a compact AR-15 accessory designed to fold down when not in use and stay ready for backup aiming when you need it. Finished in black to match most AR builds, it provides a straightforward, low-profile way to add secondary sighting capability. Features include folding design to reduce snagging, quick deployment, dual-aperture rear sight with elevation and windage adjustments, and a tritium vertical front sight post for low-light visibility. It mounts to standard 1913 Picatinny rails and is constructed from durable steel for reliability.