I was trying to clean the barrel, and I picked up the wrong bore snake. As I was pushing the bore snake through I realized that it was for a much larger caliber and there's no way that it would fit through that barrel. As I attempted the pull the bore snake out, it snagged on whatever this flat metal piece is, with the hook on it, and pulled it up a little bit. I unsnagged it, and tried to push the piece back, and it won't go in. What is this and how do I fix it?

