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MBUS™ (Magpul Back-Up Sight) Rear Sight

From the Manufacturer:

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 U.S.A.


  • 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 most any MIL-STD-1913 Picatinny/STANAG 4694 railed hand guard* and provides the same height-over-bore as standard A2 irons
  • Protective wings shield the spring-locking A2 front sight post
  • Sight can still be folded with either large or small aperture in position
  • Detent knob easily and positively adjusts windage


MBUS – Front

  1. Weight, w/ hardware: 1.3 oz.
  2. Height above rail, stowed: ~0.51 in.
  3. Length, stowed: 2.6 in.
  4. Length, deployed: 1.5 in.

Elevation Adjustment

  1. ~0.7 MOA (0.754"/100m) per click with a 14.5" sight radius
  2. ~0.5 MOA (0.547"/100m) per click with a 20" sight radius



Price: $55.95