Magpul MBUS 3 Rear Iron Sight FDE Flat Dark Earth
Magpul Industries
$56.95
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Magpul Industries
Magpul MBUS 3 Rear Iron Sight FDE Flat Dark Earth
The Magpul MBUS 3 Rear Sight in Flat Dark Earth (FDE) is the latest evolution of Magpul's legendary Back-Up Sight line, merging the slim profile of the original MBUS with the refined aesthetics of the MBUS Pro into one compact, reliable iron sight.
- Ultra-low folded profile at just 0.44" high and 1.15" wide
- Spring-loaded flip-up design deploys instantly with ambidextrous push-button
- Rapid-select dual aperture system for quick target acquisition
- Impact-resistant polymer construction keeps weight minimal without sacrificing durability
- Deploys to standard AR height for seamless co-witnessing with optics
- Flat Dark Earth finish matches popular FDE-themed AR builds perfectly
Who This Is For
The Magpul MBUS 3 Rear Sight is ideal for AR-15 and MSR owners who want a lightweight, low-profile backup iron sight that doesn't interfere with optics when stowed. Whether you're running a red dot or magnified optic as your primary, the MBUS 3 ensures you're never without a reliable sighting solution — making it a smart choice for tactical shooters, competition athletes, and serious home-defense builds alike.
Specifications
| Brand | Magpul Industries |
|---|---|
| Model | MBUS 3 Rear Sight |
| Color / Finish | Flat Dark Earth (FDE) |
| Material | Impact-Resistant Polymer |
| Folded Height | 0.44" |
| Width (Folded) | 1.15" |
| Sight Height | Standard AR Height (Deployed) |
| Aperture | Rapid-Select Dual Aperture |
| Deployment | Spring-Loaded, Ambidextrous Push-Button |
| Compatible Rail | MIL-STD-1913 Picatinny / M-LOK Compatible Rail Sections |
| Intended Use | Backup Iron Sight (BUIS) for AR-15 / MSR Platforms |
Frequently Asked Questions
Can the Magpul MBUS 3 Rear Sight co-witness with a red dot or holographic optic?
Yes. The MBUS 3 Rear Sight deploys to standard AR height, which allows it to co-witness with most red dot sights and holographic optics mounted at the same height — including popular options like the Aimpoint PRO and EOTech series. Always verify co-witness compatibility with your specific optic mount height before purchasing.
What is the difference between the MBUS 3 and the original MBUS or MBUS Pro?
The MBUS 3 combines the best of both worlds. Compared to the original MBUS, it has a significantly lower folded profile (0.44" vs. taller predecessors), making it less likely to snag or interfere with optics. While the original MBUS Pro was machined from aluminum, the MBUS 3 returns to Magpul's high-quality impact-resistant polymer — reducing weight and cost while maintaining the refined, low-snag aesthetic of the Pro line. The MBUS 3 also adds the rapid-select dual aperture system for improved versatility.
Is windage adjustment available on the MBUS 3 Rear Sight?
Yes, the Magpul MBUS 3 Rear Sight includes a tool-free windage adjustment, allowing you to dial in your point of impact without needing additional tools in the field. This makes zeroing straightforward and keeps the sight practical for real-world use as both a primary and backup sighting solution.
