Look at pic 3 of the Airsporter tap, you'll see just below the tap the Bracket that holds the front stock screws, this is held on by a screw in pin with Passes through the middle of the cocking slide, you can just see it in the pic at the bottom of the front stock screw bracket.
Undo this as it screws straight into the cylinder and remove the front stock screw bracket, you can then remove the cocking slide from the cylinder, you will also need to knock the pin out of the Cocking lever in picture 6, once this in whatever order you want has been done the whole cocking assembly can be removed