Magpul MAG248BLK MBUS Sight Rear Black Folding for AR15M16

The MBUS Magpul BackUp Sight is a lowcost color injection molded folding backup 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 AR15M16 platform. Springloaded flip up sight easily activated from either side or by pressing the top release. 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. 0.7 MOA 0.754100m per click with a 14.5 sight radius. 0.5 MOA 0.547100m per click with a 20 sight radius. Cannot be mounted to a railed gas block due to excess heat issues. Front MBUS must be mounted to a railed fore end on the same plane as the receiver rail. Because of this the sight is also not compatible with MOE Hand Guards. Made in the USA.