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Magpul MBUS Rear Sight Flip-Up Back-Up Sight

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
  • Clamps to most any MIL-STD-1913 Picatinny / STANAG 4694 railed hand guard and provides same height-over-bore as standard A2 irons
  • Protective wings shield spring-locking A2 front sight post
  • Can still be folded with either large or small aperture in position
  • Detent knob easily and positively adjusts windage
  • Color: Black
  • Windage adjustment: 0.7 MOA (0.754"/100m) per click with a 14.5" sight radius
  • Windage adjustment: ~0.5 MOA (0.547"/100m) per click with a 20" sight radius
  • Height above rail (stowed): Approx. 0.51"
  • Center of aperture to top of rail: 1.42"
  • Length: 2.6" (stowed), 1.5" (deployed)
  • Weight: 1.3 oz.
  • Made in USA
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Magpul® was founded in 1999 with the intent of developing a simple device to aid in the manipulation of rifle magazines while reloading under stress. The company’s name comes from this original product called the Magpul. Over the last nineteen years Magpul has continued to grow and develop using much the same mission and process with a focus on innovation, simplicity, and efficiency.
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MAG248BLK

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$59.99