Magpul MBUS PRO AR 15 Rear Back-Up Sight – Steel – MAG276



Enhance your AR-15 with the reliability and functionality of the Magpul MBUS PRO AR 15 Rear Back-Up Sight – Steel – MAG276. Crafted with precision and durability in mind, this rear sight is a dependable addition to any tactical setup.

Constructed from high-quality steel and finished with Melonite QPQ for exceptional resistance to wear and corrosion, the MBUS PRO Rear Back-Up Sight ensures lasting performance in any conditions. Its dual-aperture design and adjustable rear provide versatile aiming options, while positive detents maintain standard sight height when deployed.

Installation is effortless, requiring no tools thanks to the adjustable elevation knob and compact design. Whether mounted on a MIL-STD-1913 Picatinny rail or STANAG 4694 rail, including rail-height gas blocks, this sight delivers consistent performance. When stowed, its low-profile design ensures minimal interference with optics, providing a distraction-free shooting experience until needed.


  • Elevation Adjustment:
    • ~0.5 MOA (0.566"/100m) per click with a 14.5" sight radius
    • ~0.4 MOA (0.410"/100m) per click with a 20" sight radius
  • Height above rail – stowed: ~0.37 in.
  • Length – stowed: 2.1 in.
  • Weight: 1.80 oz.
  • Aperture height over rail: 1.41 in.
  • Small aperture dia.: 0.07 in.
  • Large aperture dia.: 0.19 in.

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