Williams Fire Sight Folding - Rear Sight Only For Ar-15

The Williams Fire Sight Folding – Rear Sight Only for AR-15 is a purpose-built backup iron sight engineered for rapid target acquisition and reliable performance in demanding tactical environments. Designed for shooters who demand redundancy in their optic setup, this rear sight serves as a critical secondary aiming system when primary optics fail, fog, or are rendered inoperable. Law enforcement, military personnel, and serious civilian shooters rely on folding rear sights to minimize profile when mounted behind magnified optics, then deploy them instantly when needed.

Williams has engineered this rear sight with a folding mechanism that allows the sight to lay flat against the receiver when not in use, preserving sight radius and maintaining compatibility with elevated scopes and reflex optics. The sight features precision-machined steel construction with crisp, audible detents that lock the sight firmly in both folded and deployed positions—eliminating wobble or unwanted movement under recoil. The aperture design provides rapid target acquisition at intermediate and close distances, delivering fast sight picture acquisition critical in combat or defensive scenarios where every millisecond counts.

This rear-sight-only configuration integrates seamlessly with standard AR-15 Picatinny rail systems, mounting directly to the receiver or rail sections without requiring additional adapters. It pairs ideally with any Williams front sight or competitive folding front sights from quality manufacturers, allowing shooters to establish a complete iron sight backup system. Installation is straightforward—no gunsmithing required—making it an accessible upgrade for operators who understand that redundancy in aiming systems can mean the difference between mission success and failure. The lightweight design at 0.15 lbs adds negligible weight to your platform while delivering mission-critical functionality.