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Magpul MAG527-BLK MBUS Pro LR Adjustable Sight Rear Black Adjustable for AR-15
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$137.99
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SKU: MAG527-BLK-873750001340
Overview
Built for shooters who want a compact rear sight with distance adjustment, this steel folding option adds an elevation wheel for dialing in targets from 200 to 600 meters in 50-meter increments. Its low-profile design keeps the sight unobtrusive when stowed, while positive detents help it return to standard AR sight height when deployed. The no-tool adjustment setup is suited to hunters and range users who may need to make quick changes without adding bulk to the rifle. With its case-hardened construction and Melonite finish, it presents a practical, durable sighting solution for an AR-15 setup.
Why Hunters Choose the Magpul
Elevation Adjustment
Wheel supports 200-600 meter settings
No-tool Adjustments
Simplify zeroing and field changes
All-steel, Case-hardened
Construction adds a compact, rugged
Melonite Finish
Is specified for wear and
Positive Detents
Help maintain standard AR sight
Key Features
- Adjustable rear sight for AR-15 platforms
- Elevation wheel supports 200-600 meter distance settings
- 50-meter increment adjustments for variable target distances
- All-steel, case-hardened construction with Melonite finish
- No-tool adjustments and compact low-profile design
- Positive detents maintain standard AR sight height when deployed
- Dual apertures: 0.07-inch small and 0.19-inch large
Best Used For
- Hunters and shooters needing a rear sight for variable-distance AR-15 zeroing and adjustments
- Users who want a compact, low-profile sight that stays unobtrusive when stowed
- AR owners looking for no-tool elevation changes between 200 and 600 meters
- Field users who prefer a steel rear sight with positive detents and standard sight height
Specifications
| Adjustment Type | Adjustable |
|---|---|
| Blade Finish | Melonite |
| Case Hardened | Yes |
| Color | Black |
| Country Of Origin | USA |
| Elevation Adjustment Increments | 50 M |
| Elevation Adjustment Range | 200-600 M |
| Elevation Adjustment Wheel | Yes |
| Large Aperture Diameter | 0.19 in |
| Material | All steel |
| Model | MAG527-BLK |
| No Tool Adjustments | Yes |
| Sight Height | Standard AR sight height when deployed |
| Small Aperture Diameter | 0.07 in |
| Stowed Profile | Low profile when stowed |
Pros
- Elevation adjustment wheel supports 200-600 meter settings in 50-meter increments.
- No-tool adjustments simplify zeroing and field changes.
- All-steel, case-hardened construction adds a compact, rugged profile.
- Melonite finish is specified for wear and corrosion resistance.
- Positive detents help maintain standard AR sight height when deployed.
- Low-profile design stays unobtrusive when stowed.
Considerations & Trade-offs
- The elevation wheel is preset for 200–600 m with 50 m increments, so it is geared toward that distance range rather than a universal all-purpose zeroing solution.
- The rear sight is designed to sit very low when stowed, which is convenient for a compact setup but means it is a dedicated folding sight rather than a fixed backup sight.
- The small 0.07 in aperture and larger 0.19 in aperture serve different shooting needs, so choosing the right aperture matters depending on distance and visibility conditions.
- All-steel construction adds strength, but it also makes this a more substantial option than lighter non-metal sights.
Suggested Comparisons
- Adjustable rear iron sights
- Fixed rear iron sights
- Backup iron sight sets
- AR-15 sighting accessories
Suggested Accessories
- AR-15 front sight
- Optic mount
- Sight adjustment tool
- Protective rifle case
Frequently Asked Questions
What is the MBUS Pro LR rear sight designed to do differently from the original MBUS Pro?
It adds an elevation adjustment wheel for engaging targets at variable distances, while keeping the low-profile MBUS Pro styling.
What distance range does the elevation wheel cover?
The elevation adjustment wheel is set for 200-600 meters, with 50-meter increment adjustments.
Does this rear sight require tools for adjustment?
The product description states it offers no-tool adjustments.
What aperture sizes are included?
The sight includes a small aperture diameter of 0.07 in. and a large aperture diameter of 0.19 in.
What material and finish are listed for this sight?
It is described as all steel, case hardened, and finished with Melonite.