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.
Impact resistant polymer construction
provides light weight and resists operational abuse
Spring-loaded flip up sight easily
activated from either side or by pressing the top
Detent and spring pressure keeps sight
erect but allows for unobstructed folding under impact, etc.
Clamps to MIL-STD-1913 Picatinny/STANAG
4694 receiver rail and provides the same height-over-bore as standard A2
Protective wings shield the dual, same
plane flip apertures
Sight can still be folded with either
large or small aperture in position