This an ORIGINAL hanger that attaches to the underside of the barrel on the Winchester 1873 and 1892 rifle (or carbine) in 25-20 or 32-20 cal. This will not fit the larger cal rifles. There is a pin that goes through the base of the hanger which holds the magazine tube in place. Pin is part number 728pin. REMEMBER The hangers do not go in like a sight does. The hangers TWIST in and out of the dovetail slot.