An AR-15 back up rear sight is a folding or fixed iron sight mounted at the rear of the rifle, providing an alternative aiming solution if optics fail. It offers windage adjustments and pairs with a front sight for accurate targeting. The back up rear sight works with AR-15 upper receivers, Picatinny or Weaver rail systems, handguards, and is compatible with standard front sights. It’s ideal for tactical, hunting, or competition builds, ensuring reliable sighting options in any scenario.
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