Ok, I hope this isn't to Dumb a question. I recently bought a rifle at a pawn shop that had a bad scope on it. I decided to Change the scope and when I went to remove it the rings are one piece with a single slot in the ring. How do you remove the ring from the scope? I'm sure I am missing something obvious so take it easy on me. All the scopes I have installed in the past have had two piece rings and they were pretty obvious.