Whoa..... pump the brakes turbo
You are 1 step away from a very greasy slope!
I joined 2 years ago researching a K-22 Masterpiece I inherited, now I have 14 Smiths.
Be careful my friend, these ole girls will put you in the poor house

To answer your question about the seller, no. He was incorrect. It's Military & Police. Non adjustable rear sight.

Target model Military & Police (M&P) variations were made, but are scarce. I wouldn't say they are rare (gotta be careful using that term around here).

Stick around, it's a great place. Good company and lots of good information. Nice S&W by the way. That 1 line address is so darn cool.
Bob