Strike Industries SPBUS Polymer Folding Backup Sights AR-15 Black

The Strike Industries SPBUS (Strike Polymer Backup Sights) delivers reliable iron sight backup when primary optics fail. These spring-loaded folding sights deploy instantly under pressure while maintaining a low profile when folded flat against the rail.

What Makes This Different

Unlike traditional flip-up sights that require manual deployment, the SPBUS features a unique spring-assist mechanism that automatically raises the sight when pressed. The reinforced polymer construction weighs 40% less than comparable steel alternatives while maintaining impact resistance up to 1,000G shock rating. The sight picture provides a standard A2-style post front with adjustable rear aperture for consistent target acquisition.

Key Features

• Spring-assisted deployment activates with downward pressure
• Low-profile folded height of 0.4 inches clears most optic mounts
• Reinforced polymer construction weighs only 1.2 ounces per pair
• Standard height for absolute co-witness with red dot optics
• Tool-free windage and elevation adjustments
• Fits standard Picatinny and Weaver rail systems
• Ambidextrous design works for left and right-handed shooters

Field testing shows consistent zero retention through 500+ round strings without adjustment drift. The polymer material resists temperature extremes from -20°F to 140°F while the matte black finish reduces glare under bright conditions. Competition shooters appreciate the quick deployment for rapid transitions between targets, while tactical users value the bombproof reliability when electronic optics fail.

Technical Specs

• Material: Glass-filled polymer with steel hardware
• Weight: 1.2 ounces (front and rear combined)
• Folded Height: 0.4 inches above rail
• Deployed Height: 1.5 inches (standard AR height)
• Rail Compatibility: Picatinny/Weaver 1913 spec
• Sight Radius: Optimized for 16-20 inch barrels
• Finish: Matte black polymer
• Country of Origin: USA

The SPBUS represents proven backup sight technology at a fraction of traditional steel sight weight. Professional users choose these sights for their consistent performance when primary optics are compromised or batteries fail.