The Magpul MBUS Pro Rear Sight MAG276-BLK delivers precision backup sighting for AR-platform rifles when primary optics fail. This QPQ melonite-treated steel sight provides the durability and accuracy demanded by military, law enforcement, and competitive shooters who require absolute reliability.
What Makes This Different
Unlike polymer backup sights, the MBUS Pro construction uses QPQ melonite-treated steel that withstands extreme temperatures and impacts without warping or breaking. The sight features precise windage adjustments in half-MOA increments and maintains zero even after thousands of rounds. Spring-loaded deployment ensures instant activation when needed most.
Key Features
- QPQ melonite-treated steel construction resists corrosion and wear
- Spring-loaded flip-up mechanism deploys with single-handed operation
- Windage adjustable in 0.5 MOA increments for precise zeroing
- Low-profile design clears most optic mounts and accessories
- Fits standard Picatinny/MIL-STD-1913 rails without modification
- Protective wings shield rear aperture from impact damage
- Tool-free installation with integrated mounting hardware
Field testing demonstrates consistent performance across temperature ranges from -40°F to 140°F. The sight maintains zero through rapid-fire strings and hard use scenarios typical of tactical applications. Competition shooters rely on the precise windage adjustments for quick corrections between stages, while the low profile allows co-witnessing with most red dot optics.
Technical Specs
- Material: QPQ melonite-treated steel
- Height: 1.15 inches deployed, 0.44 inches folded
- Weight: 1.2 ounces
- Windage adjustment: 0.5 MOA increments
- Rail compatibility: MIL-STD-1913 Picatinny
- Finish: Matte black QPQ coating
- Made in USA
- Limited lifetime warranty
The MBUS Pro Rear represents the gold standard for backup iron sights on modern sporting rifles. Professional users choose this sight because failure is not an option when lives depend on equipment performance.