Re: S&W 10 MP
The majority of the Model 10s produced were in 4". There were a number made in 2" and it was even a "relatively standard" sidearm of US Army CID officers in the VNera. I have always been a fan of the M&P and of the Model 10 version, and I personally prefer the "pencil" or "tapered" barrel over the "heavy barrel" models, but thats nothing more than personal preference. The only one I ever personally owned was an early 70's production 4" tapered. Good luck in your search - they are out there, but finding a 2" in particular might take a LITTLE time, if you arent willing to pay a premium for the first one you find.