HIVIZ Front Folding AR-15 Back-Up Sight for 1913 Picatinny Rail

The HIVIZ Front Folding AR-15 Back-Up Sight for 1913 Picatinny Rail (Model ARN21) is a compact, deployable front iron sight designed for tactical AR-15 platforms where a primary optic requires a redundant aiming system. This folding backup sight mounts directly to standard Picatinny rails and folds down when not in use, minimizing profile and allowing rapid deployment if your primary sight fails or when engaging targets at distances where iron sights offer precision advantages.

Built to A2-pattern front sight specifications, the ARN21 provides a familiar sight picture for shooters trained on standard AR-15 geometry. The folding mechanism allows stowage without removing the sight from the rail, and the compact footprint (3.85 inches tall, 1.25 inches wide) preserves rail real estate for other accessories like magnifiers or thermal mounts. The sight's low weight (0.19 lbs) adds negligible mass to your platform, critical when managing overall system balance and ergonomics during extended deployments or training cycles.

This backup sight suits operators and trainers who operate under combat-capable doctrine—where electronic failures, power loss, or damage to primary optics demand immediate recourse to mechanical sighting systems. Law enforcement tactical teams, military trainers, and serious AR-15 enthusiasts building duty-grade rifles benefit from the redundancy and simplicity that a quality iron sight backup provides. The folding design is also practical for shooters transitioning between optics-only and iron-sighted configurations during mixed-platform training.

Picatinny rail mounting is the industry standard for modern AR-15 platforms, ensuring compatibility across all MIL-STD-1913 compliant upper receivers and free-float handguards. The ARN21 integrates seamlessly into any rail system without adapter plates or proprietary mounting hardware, making it a plug-and-play redundancy solution for existing setups.