Detachable sights are a great option to back-up or cowitness with optics. This GG&G sight is spring-actuated and has a locking detent. The detent release is located on the left hand side so the offhand has quick and easy access to let the sight down. This variant of the Multiple Aperture Device (MAD) has 5 selectable apertures of 0.070" diameter, and pre-set for specific distances . As viewed through a small window facing the shooter below the aperture, "0" is for 25-200 yards, "3" for 300 yards, "4" for 400 yards, "5" for 500 yards and "6" for 600 yards. Sight is ballistically calibrated for 55-62 grain bullets fired from an AR-15/M-16 style carbine with 16" barrel.
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