http://www.sigsauer.com/CustomerService/documents/SIGARMSP232OM.pdf
no
Possible, but, not recommended
Stainless Steel frame
It is possible, but, not recommended
100-350 or so
50-400 usd
You will have to call Sig to find out.
100-500 depending on specifics
You will have to contact Sig. They offfer a sn letter for a reasonable fee.
sig-saur
100-800 USD or so depending on specifics
50-400 usd