I believe there are two types of but plates. Mine have a hole in the middle. Press a pen into the whole and slide the tongue of the butt plate towards the back of the clip. Next there is a metal plate underneath that plastic butt plate. The best method for removing that for me is pressing the left or right side of that plate in to get the opposite side up over the clasp holding it in. Don't pull hard on that plate since it is attached to the spring usually. It takes some figiting but it gets there eventually. And if you remove the spring from that metal backing plate for heavens sake remember or mark how the spring was alligned with that plate so you dont put it in backwards.