Magpul MBUS 3 Rear Iron Sight, Black
Magpul Industries
$56.95
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Magpul Industries
Magpul MBUS 3 Rear Iron Sight, Black
The Magpul MBUS 3 Rear Sight in Black represents the next evolution of the legendary MBUS backup sight line, combining the best of the original MBUS and MBUS Pro into one compact, feature-packed iron sight solution for AR-platform rifles.
- Ultra-low folded profile at just 0.44" high for minimal rail footprint
- Ambidextrous spring-loaded push-button deploys sight instantly under stress
- Rapid-select dual aperture system for close and precise shooting scenarios
- Impact-resistant polymer construction keeps weight low without sacrificing durability
- Deploys to standard AR-height for seamless co-witnessing with optics
- Slim 1.15" width profile fits tight rail setups alongside lights and lasers
Who This Is For
The Magpul MBUS 3 Rear Sight is ideal for AR-15 and MSR owners who want a reliable, low-profile backup iron sight that won't interfere with a primary optic. Whether you're a competitive shooter, a home-defense-focused AR builder, or a tactical enthusiast running a red dot or LPVO, the MBUS 3 provides peace-of-mind redundancy in a lightweight polymer package that won't weigh down your build or crowd your rail.
Specifications
| Brand | Magpul Industries |
|---|---|
| Model | MBUS 3 Rear Sight |
| Color | Black |
| Material | Impact-Resistant Polymer |
| Folded Height | 0.44" |
| Width | 1.15" |
| Deployment | Ambidextrous Spring-Loaded Push-Button |
| Aperture | Rapid-Select Dual Aperture |
| Sight Height | Standard AR Height |
| Rail Compatibility | MIL-STD-1913 Picatinny / M-LOK Compatible Rail |
| Compatible Platforms | AR-15, MSR, and similar flat-top rifles |
Frequently Asked Questions
Will the Magpul MBUS 3 Rear Sight co-witness with my red dot or holographic sight?
Yes. The MBUS 3 Rear Sight deploys to standard AR height, making it compatible with absolute co-witness and lower-third co-witness setups when paired with common red dot sights like the Aimpoint PRO or EOTech holographic sights. For lower-third co-witness, you may need a riser on your optic depending on your specific setup.
What is the difference between the MBUS 3 and the original MBUS or MBUS Pro?
The MBUS 3 is the latest generation, combining the affordability and polymer construction of the original MBUS with the sleek, low-profile aesthetics of the MBUS Pro. It is significantly smaller than the original MBUS — folding down to just 0.44" — while retaining the spring-loaded deployment and adding a rapid-select aperture system not found on all earlier versions.
Do I need a front sight to use the MBUS 3 Rear Sight?
Yes, the MBUS 3 Rear Sight is designed to be used in conjunction with a compatible front sight, such as the Magpul MBUS 3 Front Sight. For a complete backup iron sight (BUIS) system, you'll want a matching front and rear sight set. The rear sight alone will not provide a usable sight picture without a corresponding front post.
