I bought a replacement lock for my Lyman Great Plains rifle and need to remove the existing lock. I removed the bolt holding the lock in place but I am having trouble getting the lock out of the stock. The front part starts to come out but the rear does not want to move. Is there anything else holding it in place or do I just need to apply more careful pressure near the rear portion of the lock? I also thought about unscrewing the bolt that holds the lock in place a few turns and whacking it with a plastic hammer. I do not want to damage something by accident so I thought I would ask here first.