I recently replaced both the original front and rear sights with Dawson FO front and adjustable rear. As others have reported, the rear came out without too much difficulty, but I ended up taking a hack saw to the front! I sawed about half way through the base of the front sight, and then gently hammered it out. Both front rear sights from Dawson needed quite a bit of filing before they would fit into the dovetails. The front was glued with Loctite, but I decided not to glue the rear, except the threads of the pointed screw.