Magpul MBUS 3 Rear Sight, Flat Dark Earth

Magpul MBUS 3 Rear Sight: Refined Backup Optics

The MBUS 3 represents the latest iteration of Magpul's proven backup sight platform, combining the best features of the original MBUS and MBUS Pro into a single, refined package.

Compact Design

This sight is engineered for minimal profile without sacrificing functionality. When folded, it stands just 0.55 inches high and measures 1.38 inches at its widest point—small enough to stay out of the way yet instantly accessible when needed. At 30 grams with hardware, weight is negligible.

Construction and Durability

Magpul constructed the MBUS 3 from impact-resistant polymer rather than metal, delivering a lightweight sight that withstands hard use. The design aesthetic draws from the MBUS Pro, but the polymer construction keeps the sight affordable and durable.

Deployment and Adjustment

• Ambidextrous push-button deployment allows rapid deployment from either side
• Rapid-select aperture system with windage adjustment
• Spring-loaded mechanism ensures positive, reliable deployment
• Standard AR-height when deployed

Precision Specifications

• 0.5 MOA per click at 14.5" sight radius (0.606"/100m)
• 0.4 MOA per click at 20" sight radius (0.439"/100m)
• Fits standard Picatinny rails
• Compatible with AR-15, AR-10, M4, M16, M110, and SR-25 platforms

American Made

Manufactured in the USA, the MBUS 3 delivers proven Magpul quality at a practical price point.