Magpul MBUS Gen 2 Rear Flip-Up Iron Sight Black
Magpul Industries
$55.05
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Magpul Industries
Magpul MBUS Gen 2 Rear Flip-Up Iron Sight Black
The Magpul MBUS Gen 2 Rear Flip Sight in Black is a rugged, spring-loaded backup iron sight engineered to deliver fast, reliable target acquisition on AR-15/M16 platforms and any Picatinny-railed firearm — without breaking the bank.
- Spring-loaded flip-up design activates instantly from either side or top
- Dual aperture system offers close-range and precision shooting options
- Both apertures sit on the same focal plane for consistent eye relief
- Tool-free detent knob provides positive, repeatable windage adjustments
- Protective polymer wings shield apertures from bumps and field abuse
- Detent and spring retention keeps sight upright or folded flat securely
Who This Is For
The Magpul MBUS Gen 2 Rear Sight is ideal for AR-15 owners who run a primary optic and want a dependable, co-witnessing backup that deploys instantly if the optic fails. It's equally at home on duty rifles, home-defense builds, and competition setups where low-profile, lightweight iron sights are a must. First-time AR builders will appreciate the tool-free windage adjustment and simple drop-on Picatinny installation.
Specifications
| Brand | Magpul Industries |
|---|---|
| Model | MBUS Rear Sight Gen 2 |
| Color | Black |
| Generation | Gen 2 |
| Apertures | Dual (large / small), same focal plane |
| Adjustment | Windage (tool-free detent knob) |
| Rail Compatibility | MIL-STD-1913 Picatinny |
| Primary Platform | AR-15 / M16 |
| Material | Polymer (color injection molded) |
| Weight | Approx. 1.0 oz |
| Country of Origin | USA |
Frequently Asked Questions
Does the MBUS Gen 2 Rear Sight co-witness with common red dot optics?
Yes. The MBUS Gen 2 Rear Sight is designed to co-witness with popular red dot and holographic optics — including Aimpoint and EOTech models — when mounted on a standard flat-top AR-15 upper. Depending on your optic mount height, you may achieve absolute or lower-third co-witness. Pairing it with the Magpul MBUS Gen 2 Front Sight gives you a matched, optimized backup iron sight system.
What is the difference between the Gen 1 and Gen 2 MBUS Rear Sight?
The Gen 2 MBUS Rear Sight features a refined activation button relocated to the top of the sight body, allowing one-handed deployment from either side or directly from above. The protective wings around the apertures were also improved for better durability, and the overall profile is slightly more streamlined compared to the original Gen 1 design.
Can the MBUS Gen 2 Rear Sight be adjusted for elevation as well as windage?
The MBUS Gen 2 Rear Sight provides windage adjustment via its tool-free detent knob. Elevation is managed by switching between the two included apertures — the larger aperture suits faster, closer-range shooting, while the smaller aperture is optimized for greater precision at distance. For elevation fine-tuning, adjustments are typically made at the front sight post.
