I could be mistaken but from what little I have seen, S&W went with the same 75 degree dovetail for the their 1911 rear sight. I have not checked the fronts. Last time I checked they make a Heinie for those so you should be in good shape. You need a 75 degree x about .425" dovetail. Front sight is 75 x .260". I wish everyone used a 60 or 65 degree dovetail. It would make our tinkering much easiers!