FAB Defense FRBS Flip-Up Rifle Sight Kit – Tan | Front & Rear Backup Sights for Picatinny Rail

The FAB Defense FRBS Rifle Sights Kit in Tan delivers a premium low-profile, flip-up front and rear backup sight solution engineered for serious shooters. Designed to work as a matched set, the FRBS kit provides an exceptional optical advantage whether used as a primary sighting system or a reliable backup to your optic.

The Front Backup Sight (FBS) features tool-free elevation adjustment, while the Rear Backup Sight (RBS) allows manual windage correction—both offering quick, intuitive adjustments under field conditions. A spring-based locking mechanism ensures rock-solid deployment every time without risk of deformation or failure.

Constructed from durable fiberglass-reinforced polymer and metal, these sights maintain a sleek, snag-free profile that won’t catch on gear, webbing, or tight spaces. Both sights mount easily to any standard 1913 Picatinny rail, making them an ideal upgrade for M4, AR-15, and M16 platforms, as well as the FAB Defense KPOS chassis system.

**Key Features:**
– Matched front and rear flip-up sight kit for consistent zero and optimal eye relief pairing
– Tool-free elevation (FBS) and windage (RBS) adjustment for fast field use
– Spring-loaded locking mechanism for reliable, repeatable deployment
– Minimal protruding parts for a snag-free, low-profile design
– Compatible with all standard 1913 Picatinny rails
– Note: FBS should NOT be mounted on a railed gas block

**Specifications:**
– Length: 52 mm | Width: 32 mm | Height: 14 mm
– Deployed Length: 30 mm | Deployed Height: 42 mm
– Weight: 30 g
– Color: Tan

Order the FAB Defense FRBS Sight Kit today at VanTon Arms and get competitive pricing with fast nationwide shipping.