The dual aperture FBS Front + RBS rear sight is windage adjustable and can be mounted on all 1913 Picatinny rails, but is specially made for the M4 / AR-15 / M-16 platform and the K.P.O.S.
- Very low profile & slim design.
- Can be used as a primary or backup 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.
FBS FAB Defense Front Back-Up Sight
RBS FAB Defense Rear Back-Up Sight