I would disagree. Someone makes it because it has one right on it. The FN receiver is the same as the 1300 receiver. There is a block that fits in between the stock and the receiver that has the disticntive Winchester 'wedge' cut out on one end and a threaded hole for the stock on the other end. So, the question is, how to get my hands on one. Does FNH sell replacement parts??? If so, who is a distributor?You don't. FN doesn't make an adaptor. No one else makes an adaptor.