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The new MBUS (Magpul Back-Up Sight) GEN 2 is a low-cost, color injection molded, folding back-up sight. The dual aperture MBUS Rear Sight is adjustable for windage and fits most Picatinny rail equipped weapons.
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
Clamps to Picatinny receiver rail and provides the same height-over-bore as standard A2 irons
Protective wings shield the dual flip apertures
Sight can still be folded with either large or small aperture in position
Detent knob easily and positively adjusts windage
Reduced size for greater optics compatibility (folds to a profile of only approximately a half-inch)
Both small and large apertures are on the same plane