The Knight's Armament High NVG Quick Detach mount allows mounting of the Aimpoint Micro sight to a flat top upper or railed handguard. Quick detachable from rail. Raises the base of the Micro 1.34 inches above the top of the upper receiver. Spacer is angled at approximately a 45 degree angle. Uses 4 existing screws from the Aimpoint Micro to mount to riser. Throw lever tension is adjustable to fit rails of different widths. Aimpoint sight not included but can be purchased as a package, see the sight product page for details.