Just to clarify for trucker512000--The screw pattern on the gun does not match any sight directly, it only matches an adapter plate, which must be chosen to match the sight you want to install.
So, once you have the adapter plate, trial fit the sight on the plate and install the screws supplied with the sight. Then MAKE SURE the screws do not extend out below the adapter plate. If the screws are too long, they will bottom out on the slide cut before the sight is tight. Then remove the sight from the plate, install the plate on the slide, use blue loctite on the screws, then install the sight on the adapter plate, again with a drop of blue loctite.
Then go zero the sight and have some fun with your new setup.
Joe L