MBUS 2 Rear Back-Up Sight

The 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. Features: - 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 irons - 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 Specifications: - MBUS – Rear Gen 2 - Weight, w/ hardware: 1.3 oz. - Height above rail, stowed: ~0.51 in. - Center of aperture to top of rail: 1.42 in. - Length, stowed: 2.6 in. - Length, deployed: 1.5 in.