Brand new MAGPUL MBUS Sight–Front-Black $55

Brand new The MBUS Rear Sight is a folding, spring-loaded flip-up sight. Constructed from impact resistant polymer, the MBUS sight is both lightweight and durable. It is compatible with all Picatinny rails, and, having been specifically tailored with the AR platform in mind, has the same height-over-bore as standard A2 iron sights. Two apertures are available for use, one large and one small, and both allow the sight to be folded in position. Can be adjusted for windage with a detent knob.