FAB Defense FXFBS Flip-Up Front Sight for AR-15

The FAB Defense FXFBS is a low-profile flip-up front back-up sight designed for AR-15, M16, and M4 platforms. It can serve as a primary or auxiliary front sight and mounts on a 1913 Picatinny rail.

An ergonomic angel-wing-shaped front shroud helps center the sight picture with a compatible rear sight. The spring-locked deployment mechanism, tool-free elevation adjustment, and polymer-and-metal construction support practical use in a range of configurations.

Key Specifications

• The sight is a flip-up front back-up sight for AR-platform firearms.
• The compatible platform includes AR-15, M16, and M4 configurations.
• The mounting interface is a 1913 Picatinny rail.
• The sight uses a low folded profile designed to reduce snagging on gear, webbing, or brush.
• The deployment system features spring-locked operation.
• Elevation adjustments are made with no tools required.
• The sight features positive detent locking for elevation adjustment.
• The construction combines polymer and metal.
• The frame and front sight color are black.

With its compact folded profile and straightforward adjustment system, the FXFBS provides a practical sighting option for AR-platform setups. Its folding design, rail compatibility, and durable polymer-and-metal construction make it a functional addition to a configured rifle.