OK, for those of you who were trying to help me with this situation, Thanks. I really appreciate your help. I figured out what the problem was. The takedown lever retaining wire popped out of its channel and bound up the slide. Gunsmith had never seen anything like it, and could not come up with what might have caused it. I did a Google and You Tube search for other stories but came up blank. $4 pin and $20 to install will fix the situation, I hope. I'm hoping there is not a problem with the channel the wire rides in that caused it to pop out. If it happens again, I guess we'll know. Thanks again, all.