The MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight.
The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15/M16 platform.

Made in U.S.A.

The MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight.
The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15/M16 platform.

Made in U.S.A.

Yankee Hill Machine Forearm Mounted Flip Front Sight Matte Black.

All steel sight mounts on the same plane as the rear sight to give you a backup iron sight. Sight folds out of the sight line with the push of a button and flips and locks in the deployed position with ease. Mounts quickly and easily with the included thumb screw.  

Yankee Hill Machine Flip Rear Sight For Picatinny Rail, Matte Black.

Rugged, lightweight design with a steel base, a quick release thumb screw and aluminum stem. Locks in the deployed position with ease and takes up very little space on the upper receiver. When folded it measures .840 inches from the highest point down to the top of the upper receiver. It has a 1/2 MOA and comes with a standard rear peep aperture. Mounts to any picatinny rail.