I have never owned a Marlin until yesterday. I bought a Marlin 922M which is a .22 mag semi auto. I took it out and tried shooting it today. I shot one clip through it. When the clip is empty the action stays open. So I put a new clip in but now I can't figure out how to get the action to go back forward/closed. Can someone tell me what I need to do?? There is a little button/lever that slides back and forth on the left side of the gun. I assumed that's what I needed to move. So I did and that didn't do anything unless there is something else I need to do I am stumped.