A foldable back-up sight made of polymer and colored injection molding, the MBUS (Magpul Back-Up Sight) is inexpensive. The dual aperture MBUS Rear Sight is designed exclusively for the AR15/M16 platform and fits most 1913 Picatinny rail equipped guns. It is windage adjustable. Features: clamps to MIL-STD-1913 Picatinny/STANAG 4694 receiver rail and provides the same height-over-bore as standard A2 irons; dual, same plane flip apertures are shielded by protective wings; spring-loaded flip up sight is easily activated from either side or by pressing the top; detent and spring pressure keeps sight upright but allows for unobstructed folding under impact; etc. Regardless of the size of the aperture, the sight can still be folded. Detent knob adjusts windage quickly and accurately. Produced in the USA.
Type : Rear
Frame Material : Polymer
Frame Color : Flat Dark Earth
Base Configuration : Picatinny Rail
Style : Folding