Accu Shot BT15 3.35 Inch 1913 Rail is a standardized rail that can be attached to any standard forearm stock. This rail can adapt to stocks with hole spacings from 1.76 to 2.78 inches. The base of this rail is relieved to accomadate any kind of stock style. Normal sling studs and button head screws can be used as the screws in question. There is no hardware included with this rail as the connection will be custom for each stock you wish to modify. This rail can also be attached to the side of your butt stock for any attachments that are not required to be on your barrel.