F.A.B. Defense Rear Polymer Back-Up Sight

The F.A.B. Defense Rear Polymer Back-Up Sight (RBS) is a robust and low-profile auxiliary rear sight designed for versatility and performance. Compatible with any front sight, it excels in providing an enhanced optical experience. Easily mountable on any 1913 Picatinny rail, it is particularly suited for M4, AR-15, and M-16 platforms. The ergonomic angel-wing-shaped front shroud aids in centering the image with any front sight, ensuring optimal alignment.

Features:

• Low-profile design for minimal snagging on gear and brush
• Compatible with any front sight
• Mounts easily on 1913 Picatinny rails
• Dual apertures: 3mm for longer eye relief and low light, 1.5mm for shorter eye relief and precision
• Constructed from high-grade polymer and metal for durability
• Instant spring-locked deployment mechanism for reliable operation

With its smooth folded profile and advanced features, the RBS is an excellent choice for those seeking a reliable and effective sighting solution.