MBUS Back-Up Sight FLAT DARK EARTH - Rear
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Magpul MBUS Back-Up Sight FDE - Rear
The MBUS (Magpul® Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15/M16 platform.