Knights Armament Co rear quadrant sight for a M203 or HK EGLM 40MM Grenade launcher still in the factory sealed bag. This sight was designed to mount a Red Dot sight on the rail section on the quadrant. You can then raise the quadrant to the distance and use the Red Dot such as an Aimpoint T series (not included) for aiming . This is also designed to mount to a 1913 rail, so it fits a variety of weapons. These have been discontinued for years. Really cool KAC part that is seldom seen. $565 shipped.
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