Magpul MBUS Gen 2 Rear Sight, Flat Dark Earth

Magpul MBUS Gen 2 Rear Sight

The MBUS (Magpul Back-Up Sight) represents a practical, no-frills approach to backup iron sights. This injection-molded, folding rear sight delivers reliable performance at a price point that won't strain your budget.

Key Features

• Dual aperture design with protective wings to shield both large and small apertures
• Spring-loaded flip-up mechanism easily activated from either side or via top release
• Windage adjustable with detent knob for positive, repeatable adjustments
• Folds flat when not in use, even with either aperture selected
• Picatinny rail compatible on most 1913-equipped weapons, specifically optimized for AR-15/M16 platforms
• Made in the USA

Sight Adjustment

Windage adjustments offer 0.7 MOA per click with a 14.5-inch sight radius, or 0.5 MOA per click with a 20-inch sight radius. This precision allows you to dial in your zero with confidence.

Important Mounting Notes

The MBUS rear sight mounts to your upper receiver's Picatinny rail. Do not mount to railed gas blocks due to heat concerns. For optimal performance, pair with a front MBUS mounted to a railed fore-end on the same plane as your receiver rail. Not compatible with MOE Hand Guards.

The Bottom Line

If you need dependable backup sights without premium pricing, the MBUS Gen 2 delivers. It's a workhorse sight trusted by shooters who value function over flash.