Magpul MBUS Flip-Up Sights The Magpul MBUS Flip-Up Sights is a low-cost, colour injection molded, folding back-up sight. The dual aperture MBUS Sight is adjustable for windage and fits most 1913 Picatinny rails, but is specifically tailored to the AR15 / M16 platform. Specifications Spring-loaded flip up sight easily activated from either side or by pressing the top Protective wings shield the dual, same plane flip apertures Sight can still be folded with either large or small aperture in position Detent knob easily and positively adjusts windage Polymer construction provides light weight and resists operational abuse 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 irons More Magpul Here
