FAB Defense FRBS Offset Rifle Sights Kit — Left-Hand

Description

The FAB Defense FRBS Offset Rifle Sights Kit is a left-hand folding backup sight set designed for offset mounting on rifles. It provides low-profile front and rear flip-up sights intended for use in conjunction with magnified optics during close-quarters transitions. The rear back-up sight (RBS) offers manual windage adjustment while the front back-up sight (FBS) offers manual elevation adjustment. Constructed from fiberglass-reinforced polymer and metal, the kit mounts to a 1913 MIL-STD Picatinny rail.

Key Specifications

• The kit length is 52 mm for a compact footprint.
• The kit width is 32 mm to minimize rail intrusion.
• The kit height is 14 mm when stowed.
• The length deployed measures 30 mm for deployed operation.
• The height deployed measures 42 mm when flipped up for use.
• The kit weight is 30 gr for minimal added mass.
• Compatibility is specified as 1913 MIL-STD Picatinny rail.
• Construction uses fiberglass-reinforced polymer and metal components.

Engineered to remain unobtrusive when stowed and quick to deploy when needed, this left-hand FRBS kit is well suited for shooters running magnified optics who require a dependable offset backup solution. Tool-free adjustments and rugged construction deliver practical functionality without excess bulk, making it a clean, functional addition to modern rifle setups.