Brand new MAGPUL MBUS Sight–Rear-Black $75

Brand new The MBUS Rear Sight is adjustable for windage and fits 1913 Picatinny-railed weapons, specifically the AR15/M16 platform. Spring-loaded, folding back-up sight Same plane dual flip apertures Lightweight reinforced polymer construction All mounting hardware included Please note that MBUS sights are optimized for 5.56mm and 7.62mm NATO weapons. 9mm/45 and other pistol caliber weapons may not be fully compatible due to bullet drop at extended range.