MBUS Rear Sight

The MBUS (Magpul Back-up Sight) is a low-cost, color injection molded, folding back-up sight. The dual aperature MBUS Rear Sight is adjustable for windage, and fits all Milspec 1913 Picatinny rail-equipped weapons, but is specifaclly tailored for the AR15/M16 platform. All mounting hardware included.