I found this on GunsAmerica. It looks like a First Model M&P since that was the only one made without the lock for the ejector rod. However I can't tell if it's a round butt or a sqaure butt. What do you think? I'm speculating that it's a chop job. Just thought it looked interesting, not something you see everyday. They're asking $150.00 for it in case anyone is interested.