Magpul Industries MBUS 3 Rear Sight Flat Dark Earth Flip-Up Back-Up Sight

The Magpul MBUS 3 Rear Sight is a folding polymer backup rear sight designed to give AR-platform shooters a reliable aiming reference when their primary optic is unavailable. Built around an impact-resistant polymer housing, the sight keeps weight and bulk to a minimum while still delivering the standard AR-height sight picture.

At the core of the MBUS 3 Rear is a rapid-select aperture system with ambidextrous push-button controls that allow tool-less adjustments in the field. The sight provides 50 MOA of windage adjustment for precise zero, and it folds down to a low profile, stowing at just 0.55 inches above the rail so it provides a compact aiming reference that stays out of the way of magnified optics. The MAG1167FDE finish is Flat Dark Earth to coordinate with FDE rifles, handguards, and rail systems.

Mounting is handled by a low-profile clamp that locks onto any standard 1913 Picatinny rail without tools, and the sight fits the AR-10, AR-15, M4, M16, M110, and SR-25 platforms, making it a versatile backup option across the AR family of rifles.