FAB Defense FX-FRBSKIT Front/Rear Flip Up Sights AR-15, M4, M16 Folding Black

The FBS/RBS are an advanced, dual aperture, durable and low-profile auxiliary sights. They are readily mounted on any 1913 Picatinny rail, making it ideal for use on M4 / AR-15 / M-16 platforms and on the FAB Defense K.P.O.S.. Made of extremely durable high-grade polymer and metal, the sights features a low folded profile which is smooth and inconspicuous, and willnot snag on hear, webbing, or brush. The instant spring-lockable deployment mechanism will not slip, brake or deform. No tools needed for easy, repaid windage adjustments, with positive detent locking.