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Magpul MBUS GEN2 Rear Sight

Rear Sight

In stock
Magpul MBUS GEN2 Rear Sight
Rainier Arms Free Ground Shipping

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.


  • Impact resistant polymer construction provides light weight and resists operational abuse
  • Spring-loaded flip up sight easily activated from either side or by pressing the top
  • Detent and spring pressure keeps sight erect but allows for unobstructed folding under impact, etc.
  • Clamps to MIL-STD-1913 Picatinny/STANAG 4694 receiver rail and provides the same height-over-bore as standard A2 irons
  • 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.
  • Made in U.S.A.


  • Weight w/ hardware: 1.3 oz.
  • Height above rail (stowed): ~0.51 in.
  • Center of aperture to top of rail: 1.42 in.
  • Length (stowed): 2.6 in.
  • Length (deployed): 1.5 in.

Windage 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
More Information
Product Type Rear Sight
Manufacturer Magpul Industries

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