No such model in the S&W line.
100-500 or so
Need more info to answer. S&W has hundreds of different models.
S&w
Call S&W and they will tell you.
yes
Ask a gunsmith for assistance or call S&W.
You can request a manual for free at the S&W website.
1999
Looks like a S&W sn for an auto pistol.
Medium
You will have to contact S&W