I'm on the hunt for a good pre-lock 629 for camping and backpacking. It seems that S&W had made a variety of 629s, including 3 inch, 4 inch (mountain gun comes to mind), a 6 inch and IIRC, a 2.5 inch? I also recently came across a sold ad that said 'backpacking gun'; I believe it had a 3 inch...