FBS & RBS - FAB Defense Front + Rear Back - Up Sight - Available in Black, Green, Tan Color
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The FBS + RBS Front + Rear polymer Back-up sight is a cutting edge, low-profile, tactical back-up sight.
The dual aperture FBS Front + RBS rear sight is windage adjustable and can be mounted on all 1913 picatinny rails, but is specialty made for the M4 / AR-15 / M-16 platform and the K.P.O.S.
Very low profile & slim design
Can be used as primary or back-up sight
State-of-The-art ergonomic & ambidextrous design
All manual configuration, no tools needed for windage adjustments
Durable high grade polymer & metal construction
Spring based locking mechanism - will not break or deform