This KAC 30mm Aimpoint Comp RAS Mount for the H&K MP5 is constructed of lightweight aluminum and bolts directly to a Knight's Armament MP5 RAS forend. It positions the optic low and directly over the receiver, allowing for a proper cheek weld with the gun's buttstock. While originally designed for use with an Aimpoint Comp-type red dot sight, this mount is also compatible with any other 30mm red dot optic. *This optic mount MUST be used in conjunction with a KAC MP5 RAS forend (not included). It bolts directly to this forend.