A flip up rear sight is a folding iron sight that provides an adjustable rear aiming reference and stows flat when using optics. It deploys quickly for backup or primary use. Works with AR-15/AR-10 upper receivers, Picatinny or Weaver rail handguards/receivers, front sights (fixed or flip-up), and standard barrels/gas systems. Ideal for co-witness with red dots and as a dependable backup on tactical, hunting, or competition builds.
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