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Sights
FMA Back UP Sights（FBUS）
TB01
The FBUS (fma Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The dual aperture FBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15 / M16 platform.
SPRING-LOADED FLIP UP SIGHT Spring-loaded flip up sight easily activated from either side or by pressing the top Protective wings shield the dual, same plane flip apertures Sight can still be folded with either large or small aperture in position Detent knob easily and positively adjusts windage pressing the top Protective wings shield the spring-locking A2 front sight post
Weight: 31g+34g
Material: plastic
Color:BK,DE,FG,OD