At the range with my Colt Trooper, I squeezed the trigger and no bang. The gun did not fire because the cylinder did not put a fresh round under the hammer. Then something in my hand, it was the hand/safety connector spring with the end broken off. Without the hand, the cylinder won't turn. (I did learn that if I aim the gun down, gravity will position the hand.) So I called Colt and 2 gunsmiths but they did not have the spring. Colt did say if I sent it in, they had a hand that they would use. I did not want to send it in. I had put the spring in before when I replaced the trigger return spring so I just wanted to get my hands on a new spring. As luck would have it, there was one on Gunbroker.com. I bid high enough to be sure I would get it and I did. It arrived this afternoon but I can't get it in. It seems that the little curlicue on the end is too big to fit into the hole on the hand. The old spring went in easy but not this one. Kuhnhausen doesn't say anything about it. So if anyone knows the trick, I'd love to hear it.