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.
Made in the USA.
|Height above rail, stowed||~0.51 in.|
|Length, deployed||1.5 in.|
|Length, stowed||2.6 in.|
|Weight, w/ hardware||1.3 oz.|
Center of aperture to top of rail: 1.42 in.
~0.7 MOA (0.754"/100m) per click with a 14.5" sight radius
~0.5 MOA (0.547"/100m) per click with a 20" sight radius