FAB Defense FX-FBS Front Back-Up Sight for AR-15
Low-profile auxiliary front sight for AR-15/M4/M16 platforms. Features tool-free elevation adjustment, spring-locked deployment, and durable polymer/metal construction. Mounts on Picatinny rails.
Advanced Auxiliary Sighting Solution
The FAB Defense FX-FBS Front Back-Up Sight represents a thoughtful approach to auxiliary aiming systems. This low-profile sight serves as either a primary or backup option, designed specifically for modern sporting rifles built on the AR-15 platform.
Key Features
- Quick Elevation Adjustment: Elevation changes require no tools—a significant advantage in the field or at the range
- Picatinny Rail Compatible: Mounts securely on any standard 1913 Picatinny rail system
- Spring-Locked Deployment: Instant, reliable deployment mechanism that resists slipping, breaking, or deformation
- Low-Profile Design: When folded, the sight remains smooth and unobtrusive, preventing snags on gear or brush
- Durable Construction: High-grade polymer and metal materials ensure longevity under demanding conditions
- Ergonomic Shroud: The distinctive angle-wing-shaped front shroud helps center your sight picture with any compatible rear sight
Optimal Performance
While functional with any rear sight system, the FX-FBS achieves its full potential when paired with the matching FAB Defense RBS Rear Back-Up Sight. Together, these sights create a precise optical tunnel that enhances accuracy and accelerates target acquisition.
The FX-FBS is an intelligent choice for shooters seeking reliable backup sighting without unnecessary bulk or complexity.
