I have been looking forward to one of the 686 plus Mountain Guns since they were announced. My local shop wasn't able to get one in, so I ordered one from Midway when they got a shipment. I picked it up from my shop on 17 June, and it appeared fine. I put a cylinder of 38-specials through it with no issues, then loaded 7 factory .357s. I was getting used to the trigger, and was firing single-action. The first 6 .357s fired without incident, but the hammer would not stay cocked for the 7th round. After trying twice, I opened the cylinder, removed the live round, then attempted to cock it again. That time, the hammer stayed back. I pulled the trigger to dryfire it......and nothing happened. The trigger wouldn't move. The hammer, trigger, and cylinder were all locked. I called S&W the following morning and shipped it to them that day. I hope and expect they will sort it out and get it back to me soon.