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The MBUS (Magpul Back-Up Sight) is a folding die-cast sight. The dual-aperture MBUS rear sight is horizontally adjustable and fits most weapons with a standard Picatinny rail, but is specially adapted for the AR15/M16 platform.
The polymer construction of the rear sight provides light weight and resistance to operational loads.
The spring-loaded folding rear sight is easily activated from either side or by pressing from above. The fenders protect double flaps in the same plane.
The rear sight can be folded into a position with a large or small aperture.
The detent and spring pressure hold the scope upright but allow it to fold unhindered on impact.
The latch knob easily and accurately adjusts the rear sight horizontally.
Made in the USA.
Characteristics
Mount: Picatinny rail, STANAG 4694
Horizontal adjustment:
~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
Height above rail, stowed: 0.51 in
Center of aperture to top of rail: 1.42 in
Material: polymer
Length, deployed: 1.5 in
Length, stowed: 2.6 in
Weight: 1.3 oz