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Magpul MBUS PRO Sight Rear Black MAG276
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$118.99
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SKU: MAG276-873750008387
Overview
Built as a back-up rear sight for 1913 Picatinny rail setups, this Magpul option is suited to rifles that need a dependable iron-sight solution alongside an optic. It offers windage adjustment and a dual-aperture layout, giving the shooter a straightforward way to refine sight picture for different shooting needs. Positive detents help it lock into the deployed or stowed position, and the low-profile stowed form is useful when keeping the rifle streamlined. The all-steel construction and Melonite QPQ finish are aimed at hard use in demanding field conditions.
Why Hunters Choose the Magpul
All-steel Back-up
Sighting solution for 1913 Picatinny
Dual Aperture
Windage adjustment for flexible zeroing
Positive Detents
Hold standard AR sight height
Stows Low
To reduce profile when not
Selectable Match
Standard width steel rectangular sight
Key Features
- All-steel back-up rear sight for 1913 Picatinny rail mounting applications
- Dual aperture rear sight with windage adjustment
- Positive detents hold the sight at standard AR height when deployed
- Stows low when not in use
- Selectable steel rectangular sight post widths: match and standard
- Case hardened with Melonite QPQ finish for wear and corrosion resistance
Best Used For
- Hunters building a 1913 Picatinny rail setup who want a back-up rear sight option
- Users needing a windage-adjustable rear sight for AR-style rifles and rail-height gas blocks
- Shooters who prefer a stowed sight that locks low and deploys to standard AR sight height
- Owners wanting a steel rear sight with dual aperture configuration and selectable post widths
- Field users looking for a compact back-up sighting solution for hard-use rifle setups
Specifications
| Aperture | Dual aperture |
|---|---|
| Blade Finish | Melonite QPQ |
| Case Hardened | Yes |
| Corrosion Resistant | Yes |
| Detents | Positive detents |
| Elevation Adjustable | No-tool front elevation adjustable |
| Made In Usa | Yes |
| Material | All-steel |
| Mounting Compatibility | 1913 Picatinny rail |
| Rail Height Gas Block Compatible | Yes |
| Sight Height | Standard AR sight height when deployed; low when stowed |
| Sight Post | Steel rectangular sight post |
| Sight Post Width Options | Match and standard widths |
| Sight Type | Rear sight |
| Windage Adjustable | Yes |
Pros
- All-steel back-up sighting solution for 1913 Picatinny rail applications
- Dual aperture rear sight with windage adjustment for flexible zeroing
- Positive detents hold standard AR sight height when deployed
- Stows low to reduce profile when not in use
- Selectable match and standard width steel rectangular sight post
- Compatible with rail-height gas blocks
Considerations & Trade-offs
- This is a rear sight only, so it is intended to be paired with a compatible front sight or optic setup as part of a complete sighting system.
- It is designed for 1913 Picatinny rail mounting, which makes fitment dependent on that rail standard and may not suit other platforms without the proper interface.
- The low-profile stowed position is useful for keeping the sight out of the way, but it also means you need to deploy it before use.
- The selectable aperture widths add flexibility, but they also require the user to choose the setting that best matches the task or preference.
Suggested Comparisons
- Back-up iron sights
- Rear rifle sights
- Picatinny rail sights
- AR-style sighting systems
Suggested Accessories
- Picatinny rail mount
- Backup iron sight set
- Optics mounting hardware
- Sight adjustment tool
Frequently Asked Questions
What type of sight is the Magpul MBUS Pro Sight Rear MAG276?
It is a Magpul Back-Up Sight rear sight, designed as a corrosion resistant all-steel back-up sighting solution.
What mounting systems is this rear sight compatible with?
It is described as working with all 1913 Picatinny rail mounting applications, including rail-height gas blocks.
How does the rear sight adjust?
The rear sight is windage adjustable. The product description also notes a dual aperture setup as part of the MBUS Pro system.
Does the sight stay in a fixed position when deployed or stowed?
Positive detents keep the MBUS Pro Rear at standard AR sight height when deployed and low when it is stowed.
What finish or surface treatment is mentioned for this sight?
The sight is case hardened and finished with Melonite QPQ. The description says this is for resistance to wear and corrosion, but it does not provide performance measurements.